Growing Sunflower in Phnom Penh
🇰🇭 Zone 13 Planting Guide · Tropical savanna climate
Quick Answer: Growing Sunflower in Phnom Penh
Yes, you can grow Sunflower in Phnom Penh, KH! Plant during Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec for best results. Phnom Penh is in USDA Zone 13 with a Tropical savanna climate, offering 365 frost-free days per year. The difficulty level is easy, and Sunflower takes 70-100 days to harvest. Sunflower needs full sun and moderate watering.
Climate Match Analysis
Phnom Penh's temperatures (22°C to 35°C) are within the tolerable range for Sunflower (8°C to 35°C), though not always in the optimal zone (18°C to 28°C). Plant during recommended months for best results.
Phnom Penh Climate Data
Sunflower Planting Calendar for Phnom Penh
Green months show the best time to plant Sunflower in Phnom Penh
Sunflower Growing Requirements
Sunlight
Full Sun
6+ hours direct sunlight
Water
Moderate
Keep soil consistently moist
Days to Harvest
70-100
From planting to first harvest
Difficulty
Great for beginners
💡 Growing Tips for Sunflower
Sow directly -- taproots don't transplant well. Great for kids to grow. 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.
Frost tolerance: Sunflower is NOT frost tolerant — wait until after the last frost in Phnom Penh.
Companion Plants for Sunflower
Find out which plants grow best alongside Sunflower — and which to keep apart
Grow Sunflower Indoors
No garden? Learn how to grow Sunflower indoors with our complete guide
How to Grow Sunflower in Phnom Penh
Phnom Penh, KH is in USDA Hardiness Zone 13 with a Tropical savanna climate (Köppen Aw). With winter lows of 22°C and summer highs of 35°C, the growing season spans approximately 365 frost-free days. Sunflower is one of the easiest plants to grow in this climate.
Sunflower thrives in temperatures between 18°C and 28°C, requiring full sun and moderate watering. In Phnom Penh, the best months to plant Sunflower are January, February, March, April, May, June, July, August, September, October, November, December. Sunflower is not frost tolerant, so it's important to wait until after the last spring frost before transplanting outdoors. Expect to harvest in approximately 70-100 days after planting.
Phnom Penh receives 1389mm of annual rainfall, which provides good natural moisture for Sunflower. Monitor soil moisture and water as needed.
Other Plants That Grow in Phnom Penh
More plants you can grow alongside Sunflower in Phnom Penh
Keep Exploring
Frequently Asked Questions
Can I grow sunflower in Phnom Penh?
Yes! Sunflower can be successfully grown in Phnom Penh, KH. Phnom Penh is in USDA Hardiness Zone 13 with a Tropical savanna climate. The difficulty level for growing Sunflower here is rated "easy". The best months to plant are January, February, March, April, May, June, July, August, September, October, November, December.
When should I plant sunflower in Phnom Penh?
In Phnom Penh, the recommended planting months for Sunflower are January, February, March, April, May, June, July, August, September, October, November, December. Phnom Penh has 365 frost-free days per year, with winter lows of 22°C and summer highs of 35°C. Since Sunflower is not frost tolerant, make sure to plant after the last frost date.
How long does sunflower take to grow in Phnom Penh?
Sunflower typically takes 70-100 days from planting to harvest. In Phnom Penh's Tropical savanna climate with 365 frost-free days, you have plenty of time to grow Sunflower to maturity. Sow directly -- taproots don't transplant well. Great for kids to grow. 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.
Can I grow sunflower indoors in Phnom Penh?
Sunflower can potentially be grown indoors in Phnom Penh with proper conditions. It requires full sun (6+ hours of direct light — a south-facing window or grow lights recommended). Indoor growing extends your season beyond the Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec outdoor planting window. Use containers with good drainage and moderate watering.
What month do I plant sunflower in Phnom Penh?
Plant Sunflower in Phnom Penh during January, February, March, April, May, June, July, August, September, October, November, December. These are the optimal months based on Phnom Penh's USDA Zone 13 climate, 365 frost-free days, and temperature range of 22°C to 35°C.
Is sunflower hard to grow in Phnom Penh?
Sunflower is rated "easy" to grow in Phnom Penh. This is a great choice for beginners — it is forgiving and adapts well to this climate. The climate match for Sunflower in Phnom Penh is Good.
What grows well with sunflower in Phnom Penh?
In Phnom Penh, you can grow many companion plants alongside Sunflower. Good options from the same planting window include Tomato, Basil, Lettuce, Carrot and 2 more. These plants share similar planting months and thrive in Phnom Penh's Zone 13 climate.
Does sunflower need full sun in Phnom Penh?
Sunflower requires full sun. In Phnom Penh, provide at least 6 hours of direct sunlight daily. During peak summer heat, some afternoon shade can help prevent heat stress.