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Flower Full Sun Moderate water

Zinnia

Written by the GrowByCity Editorial Team · Updated April 2026
2 min read

Vibrant cut flower in every color. A warmth-loving plant that does best between 18°C and 28°C, zinnia adapts well to tropical and subtropical conditions but cannot tolerate frost. Plant in a spot with full sun (6-8 hours of direct light daily) and provide moderate, even watering throughout the growing season. Expect blooms in approximately 60-70 days. A magnet for pollinators, it supports bees, butterflies, and beneficial insects while brightening your garden.

Harvest 60-70 days
Temp Range 10°C — 35°C

Quick Answer: How to Grow Zinnia

Zinnia takes 60-70 days to harvest. It grows best in 18–28°C with full sun and moderate watering. Zinnia is not frost tolerant — wait until after the last frost to plant. It can be grown in 350 cities worldwide.

Find the best time to plant Zinnia in your city →

Growing Requirements

☀️
Sun
Full Sun
💧
Water
Moderate
❄️
Frost
Sensitive
📅
Harvest
60-70 days

Temperature Range

18-28°C
-10°C 45°C
Optimal: 18–28°C Tolerates: 10–35°C
Tropical suitable: Yes
Cities growing: 350 of 350

Growing Tips

💡

Expert Tips

Sow directly after frost. Space for air circulation to prevent mildew. Wait until soil warms to at least 18°C before transplanting outdoors — cold soil stunts growth and can invite root rot. Water steadily but avoid soggy soil. A 5-cm layer of organic mulch helps balance moisture and suppress weeds.

Quick Facts

  • Grows in 350 of 350 cities
  • Available in 7 regions worldwide
  • Temperature range: 10°C to 35°C
  • Optimal growing: 18°C to 28°C
  • Harvest in 60-70 days

Did You Know?

  • 🌱 Zinnia loves the heat! It thrives in tropical and subtropical climates year-round.
  • 🌱 Zinnia needs at least 6-8 hours of direct sunlight daily for optimal growth.

Step-by-Step Growing Guide

Zinnias are warm-season annuals that despise cold and transplanting — direct sow after the last frost when soil is at least 18°C. Sow seeds 6mm deep, 15cm apart, in rows 30–45cm wide, thinning to 30cm final spacing. They thrive in virtually any well-drained soil with pH 5.5–7.5, and in full sun — minimum 8 hours. Like marigolds, they tolerate poor soils; rich soil with excessive nitrogen produces leafy plants with fewer flowers. Water deeply but infrequently — 2.5cm per week — always at the base; wet foliage is an open invitation to powdery mildew. A single balanced fertilizer application at planting and another at first bud is all zinnias need. Pinch seedlings at 4–5 leaves for a bushier plant with more flowering stems. Deadhead or cut for vases continuously — zinnias are among the best cut-and-come-again flowers in the garden.

Common Pests & Problems

Powdery mildew (Golovinomyces cichoracearum) is the universal late-season zinnia problem — a white talcum coating on upper leaf surfaces appears first on lower, shaded leaves and progresses upward; prevention through plant spacing and base-only watering is far more effective than treatment; neem oil or potassium bicarbonate sprays can slow spread. Alternaria leaf spot (Alternaria zinniae) causes irregular brown spots with red borders on leaves and petals in warm, humid conditions; remove affected tissue and avoid overhead watering. Bacterial leaf spot (Pseudomonas syringae pv. zinniae) produces angular, water-soaked lesions with yellow halos on leaves after prolonged wet weather; copper-based sprays provide some protection.

Harvest & Storage

Cut zinnias when the stem is fully firm and rigid — soft, bendable stems indicate the flower will not last in the vase. The "wiggle test" is definitive: grasp the stem 15cm below the bloom and shake; if the head wobbles, it's not ready. Harvest in the early morning, cutting above a leaf node to encourage new branching. Strip leaves from the lower two-thirds of the stem. Vase life is 7–10 days in clean water. For seed saving, allow selected blooms to fully dry on the plant.

Popular Varieties

"Benary's Giant" series is the gold standard for cutting gardens — tall stems (90–120cm), very large fully double blooms in a wide color range, and exceptional vase life of 10–14 days. "Zahara" series is a compact, heat-tolerant series with outstanding powdery mildew resistance — excellent for hot, humid climates where standard zinnias struggle. "Queen Lime" series includes the remarkable chartreuse, red, and bicolor varieties that opened an entirely new color palette for zinnia breeding. "State Fair" is a classic tall mixed variety with giant blooms — reliable, vigorous, and an excellent all-purpose cutting zinnia.

Where to Grow Zinnia

Zinnia can be grown in 350 cities across 7 regions worldwide

🌍

Europe

80 cities
🌏

Asia

79 cities
🌎

North America

78 cities
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Africa

39 cities
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South America

39 cities
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Oceania

19 cities
🕌

Middle East

16 cities

🌍 Europe (80 cities)

City Level JanFebMarAprMayJunJulAugSepOctNovDec
Aarhus, DK easy
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Amsterdam, NL easy
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Ankara, TR easy
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Antalya, TR easy
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Athens, GR easy
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Barcelona, ES easy
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Bari, IT easy
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Belgrade, RS easy
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Bergen, NO easy
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Berlin, DE easy
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Bilbao, ES easy
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Bologna, IT easy
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Bordeaux, FR easy
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Bratislava, SK easy
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Brussels, BE easy
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Bucharest, RO easy
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Budapest, HU easy
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Catania, IT easy
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Cologne, DE easy
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Copenhagen, DK easy
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Corfu, GR easy
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Cork, IE easy
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Dublin, IE easy
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Dubrovnik, HR easy
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Edinburgh, GB easy
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Florence, IT easy
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Frankfurt, DE easy
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Gdansk, PL easy
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Genoa, IT easy
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Glasgow, GB easy
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Gothenburg, SE easy
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Hamburg, DE easy
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Helsinki, FI easy
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Heraklion, GR easy
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Istanbul, TR easy
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Izmir, TR easy
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Krakow, PL easy
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Kyiv, UA easy
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Limassol, CY easy
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Lisbon, PT easy
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Ljubljana, SI easy
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London, GB easy
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Lyon, FR easy
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Madrid, ES easy
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Malaga, ES easy
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Marseille, FR easy
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Milan, IT easy
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Munich, DE easy
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Naples, IT easy
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Nice, FR easy
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Nicosia, CY easy
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Oslo, NO easy
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Palermo, IT easy
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Paris, FR easy
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Porto, PT easy
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Poznan, PL easy
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Prague, CZ easy
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Reykjavik, IS easy
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Riga, LV easy
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Rome, IT easy
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Seville, ES easy
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Sofia, BG easy
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Split, HR easy
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Stockholm, SE easy
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Strasbourg, FR easy
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Stuttgart, DE easy
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Tallinn, EE easy
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Thessaloniki, GR easy
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Tirana, AL easy
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Toulouse, FR easy
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Turin, IT easy
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Turku, FI easy
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Valencia, ES easy
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Valletta, MT easy
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Verona, IT easy
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Vienna, AT easy
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Vilnius, LT easy
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Warsaw, PL easy
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Zagreb, HR easy
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Zurich, CH easy
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🌏 Asia (79 cities)

City Level JanFebMarAprMayJunJulAugSepOctNovDec
Ahmedabad, IN easy
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Almaty, KZ easy
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Bali, ID easy
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Bandung, ID easy
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Bangalore, IN easy
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Bangkok, TH easy
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Beijing, CN easy
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Busan, KR easy
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Cebu, PH easy
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Chandigarh, IN easy
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Chengdu, CN easy
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Chennai, IN easy
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Chiang Mai, TH easy
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Chittagong, BD easy
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Chongqing, CN easy
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Coimbatore, IN easy
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Colombo, LK easy
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Da Nang, VN easy
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Dalian, CN easy
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Davao, PH easy
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Delhi, IN easy
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Dhaka, BD easy
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Dharan, NP easy
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Fukuoka, JP easy
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Galle, LK easy
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Guangzhou, CN easy
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Hangzhou, CN easy
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Hanoi, VN easy
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Harbin, CN easy
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Ho Chi Minh City, VN easy
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Hong Kong, HK easy
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Hyderabad, IN easy
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Incheon, KR easy
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Indore, IN easy
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Islamabad, PK easy
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Jaipur, IN easy
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Jakarta, ID easy
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Jeju, KR easy
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Johor Bahru, MY easy
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Karachi, PK easy
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Kathmandu, NP easy
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Kochi, IN easy
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Kolkata, IN easy
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Kuala Lumpur, MY easy
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Kunming, CN easy
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Kyoto, JP easy
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Lahore, PK easy
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Lucknow, IN easy
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Manila, PH easy
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Mumbai, IN easy
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Nagoya, JP easy
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Nanjing, CN easy
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Nha Trang, VN easy
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Okinawa, JP easy
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Osaka, JP easy
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Pattaya, TH easy
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Penang, MY easy
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Phnom Penh, KH easy
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Pune, IN easy
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Sapporo, JP easy
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Seoul, KR easy
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Shanghai, CN easy
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Shenzhen, CN easy
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Siem Reap, KH easy
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Singapore, SG easy
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Surabaya, ID easy
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Surat, IN easy
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Taipei, TW easy
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Tashkent, UZ easy
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Tbilisi, GE easy
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Tokyo, JP easy
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Ulaanbaatar, MN easy
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Varanasi, IN easy
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Vientiane, LA easy
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Visakhapatnam, IN easy
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Wuhan, CN easy
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Xi'an, CN easy
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Xiamen, CN easy
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Yangon, MM easy
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🌎 North America (78 cities)

City Level JanFebMarAprMayJunJulAugSepOctNovDec
Albuquerque, US easy
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Anchorage, US easy
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Atlanta, US easy
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Austin, US easy
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Baltimore, US easy
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Baton Rouge, US easy
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Boise, US easy
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Boston, US easy
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Bridgetown, BB easy
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Buffalo, US easy
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Calgary, CA easy
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Cancun, MX easy
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Charleston, US easy
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Charlotte, US easy
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Chattanooga, US easy
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Chicago, US easy
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Denver, US easy
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Des Moines, US easy
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Detroit, US easy
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Edmonton, CA easy
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El Paso, US easy
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Fargo, US easy
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Fresno, US easy
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Guadalajara, MX easy
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Halifax, CA easy
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Hartford, US easy
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Havana, CU easy
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Honolulu, US easy
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Houston, US easy
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Jacksonville, US easy
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Kansas City, US easy
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Kingston, JM easy
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Knoxville, US easy
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Las Vegas, US easy
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Little Rock, US easy
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Los Angeles, US easy
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Louisville, US easy
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Lubbock, US easy
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Madison, US easy
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Memphis, US easy
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Mexico City, MX easy
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Miami, US easy
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Milwaukee, US easy
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Minneapolis, US easy
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Monterrey, MX easy
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Montreal, CA easy
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Nashville, US easy
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New Orleans, US easy
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New York, US easy
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Oaxaca, MX easy
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Oklahoma City, US easy
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Omaha, US easy
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Ottawa, CA easy
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Panama City, PA easy
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Phoenix, US easy
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Pittsburgh, US easy
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Portland, US easy
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Puebla, MX easy
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Quebec City, CA easy
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Raleigh, US easy
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Richmond, US easy
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Sacramento, US easy
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Salt Lake City, US easy
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San Diego, US easy
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San Francisco, US easy
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San Jose, CR easy
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Santo Domingo, DO easy
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Saskatoon, CA easy
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Savannah, US easy
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Seattle, US easy
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Spokane, US easy
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St. Louis, US easy
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Tampa, US easy
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Toronto, CA easy
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Tucson, US easy
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Vancouver, CA easy
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Victoria, CA easy
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Winnipeg, CA easy
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🌍 Africa (39 cities)

City Level JanFebMarAprMayJunJulAugSepOctNovDec
Abidjan, CI easy
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Accra, GH easy
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Addis Ababa, ET easy
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Algiers, DZ easy
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Antananarivo, MG easy
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Arusha, TZ easy
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Bamako, ML easy
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Bloemfontein, ZA easy
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Cairo, EG easy
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Cape Town, ZA easy
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Casablanca, MA easy
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Dakar, SN easy
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Dar es Salaam, TZ easy
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Douala, CM easy
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Durban, ZA easy
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Entebbe, UG easy
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Fez, MA easy
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Freetown, SL easy
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Harare, ZW easy
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Johannesburg, ZA easy
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Kampala, UG easy
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Kigali, RW easy
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Kinshasa, CD easy
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Lagos, NG easy
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Libreville, GA easy
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Lilongwe, MW easy
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Lome, TG easy
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Luanda, AO easy
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Lusaka, ZM easy
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Maputo, MZ easy
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Marrakech, MA easy
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Mombasa, KE easy
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Nairobi, KE easy
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Ouagadougou, BF easy
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Port Louis, MU easy
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Pretoria, ZA easy
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Tunis, TN easy
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Windhoek, NA easy
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Zanzibar, TZ easy
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🌎 South America (39 cities)

City Level JanFebMarAprMayJunJulAugSepOctNovDec
Arequipa, PE easy
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Asuncion, PY easy
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Barranquilla, CO easy
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Belem, BR easy
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Bogota, CO easy
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Brasilia, BR easy
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Buenos Aires, AR easy
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Cali, CO easy
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Campinas, BR easy
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Caracas, VE easy
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Cartagena, CO easy
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Concepcion, CL easy
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Cordoba, AR easy
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Curitiba, BR easy
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Cusco, PE easy
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Fortaleza, BR easy
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Georgetown, GY easy
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Goiania, BR easy
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Guayaquil, EC easy
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La Paz, BO easy
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Lima, PE easy
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Manaus, BR easy
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Medellin, CO easy
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Mendoza, AR easy
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Montevideo, UY easy
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Paramaribo, SR easy
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Port of Spain, TT easy
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Porto Alegre, BR easy
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Quito, EC easy
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Recife, BR easy
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Rio de Janeiro, BR easy
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Rosario, AR easy
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Salvador, BR easy
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Santa Cruz, BO easy
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Santiago, CL easy
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Sao Paulo, BR easy
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Sucre, BO easy
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Trujillo, PE easy
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Valparaiso, CL easy
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🌊 Oceania (19 cities)

City Level JanFebMarAprMayJunJulAugSepOctNovDec
Adelaide, AU easy
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Alice Springs, AU easy
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Auckland, NZ easy
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Brisbane, AU easy
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Cairns, AU easy
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Canberra, AU easy
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Christchurch, NZ easy
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Darwin, AU easy
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Dunedin, NZ easy
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Gold Coast, AU easy
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Hamilton, NZ easy
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Hobart, AU easy
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Melbourne, AU easy
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Noumea, NC easy
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Perth, AU easy
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Suva, FJ easy
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Sydney, AU easy
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Townsville, AU easy
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Wellington, NZ easy
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🕌 Middle East (16 cities)

City Level JanFebMarAprMayJunJulAugSepOctNovDec
Abu Dhabi, AE easy
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Amman, JO easy
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Baghdad, IQ easy
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Beirut, LB easy
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Doha, QA easy
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Dubai, AE easy
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Erbil, IQ easy
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Jeddah, SA easy
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Kuwait City, KW easy
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Manama, BH easy
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Muscat, OM easy
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Riyadh, SA easy
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Sana'a, YE easy
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Tabriz, IR easy
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Tehran, IR easy
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Tel Aviv, IL easy
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✓

When should I plant zinnia in my city?

The best time to plant zinnia depends on your local climate zone. It thrives in temperatures between 18°C and 28°C. Wait until after the last frost in your area. Check your city's planting calendar on GrowByCity for exact dates.

Can I grow zinnia in winter?

Zinnia is not frost tolerant and cannot survive winter outdoors in most temperate climates. In tropical areas (USDA Zones 10+), it may grow year-round.

Get Zinnia Seeds & Plants

Ready to start growing? Find Zinnia seeds and starter plants online.

Shop on Burpee Search on Amazon

People Also Search For

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Similar Growing Requirements

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15-24°C
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Pepper

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20-30°C
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Cucumber

Vegetable · Full Sun

20-30°C
🥬

Zucchini

Vegetable · Full Sun

18-27°C

Frequently Asked Questions about Zinnia

When should I plant zinnia?

The best time to plant zinnia depends on your local climate. Zinnia grows best in temperatures between 18°C and 28°C (can tolerate 10°C to 35°C). Zinnia is not frost tolerant, so wait until after the last frost in your area. Check your city's planting calendar on GrowByCity for exact planting months.

Can zinnia grow in tropical climates?

Yes! Zinnia can grow in tropical climates. It's successfully grown in tropical cities like Abidjan, Abu Dhabi, Accra. Zinnia requires full sun and moderate watering.

How long does zinnia take to grow?

Zinnia typically takes 60-70 days from planting to harvest. It requires full sun and moderate watering. Sow directly after frost. Space for air circulation to prevent mildew. Wait until soil warms to at least 18°C before transplanting outdoors — cold soil stunts growth and can invite root rot. Water steadily but avoid soggy soil. A 5-cm layer of organic mulch helps balance moisture and suppress weeds.

Find the Best Time to Plant Zinnia

See the planting calendar for Zinnia in these popular cities:

London, GBMumbai, INNew York, USParis, FRSingapore, SGSydney, AUTokyo, JPToronto, CA

Last updated: March 2026 · Climate data from NOAA, FAO, USDA

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