Growing Green Onion in Honolulu
🇺🇸 Zone 12 Planting Guide · Tropical savanna climate
Quick Answer: Growing Green Onion in Honolulu
Yes, you can grow Green Onion in Honolulu, US! Plant during Nov, Dec, Jan, Feb, Mar for best results. Honolulu is in USDA Zone 12 with a Tropical savanna climate, offering 365 frost-free days per year. The difficulty level is easy, and Green Onion takes 20-30 days to harvest. Green Onion needs full sun and regular watering.
Climate Match Analysis
Honolulu's climate requires careful timing. Summer highs (31°C) exceed Green Onion's maximum (28°C), so plant early or provide shade. Follow the recommended planting months for success.
Honolulu Climate Data
Green Onion Planting Calendar for Honolulu
Green months show the best time to plant Green Onion in Honolulu
Green Onion Growing Requirements
Sunlight
Full Sun
6+ hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
20-30
From planting to first harvest
Difficulty
Great for beginners
💡 Growing Tips for Green Onion
Can regrow from store-bought roots in water. Succession plant every 2 weeks. Can be planted 2-3 weeks before the last expected frost, giving it a head start on the growing season. Aim for about 2.5 cm of water per week, adjusting for rainfall. Organic mulch around the base helps maintain even moisture.
Frost tolerance: Green Onion is frost tolerant — you can plant earlier in spring.
How to Grow Green Onion in Honolulu
Honolulu, US is in USDA Hardiness Zone 12 with a Tropical savanna climate (Köppen Aw). With winter lows of 19°C and summer highs of 31°C, the growing season spans approximately 365 frost-free days. Green Onion is one of the easiest plants to grow in this climate.
Green Onion thrives in temperatures between 10°C and 22°C, requiring full sun and regular watering. In Honolulu, the best months to plant Green Onion are November, December, January, February, March. Since Green Onion can tolerate frost, you have flexibility to plant earlier in the season or extend into cooler months. Expect to harvest in approximately 20-30 days after planting.
Honolulu receives only 434mm of annual rainfall, so consistent irrigation will be essential for growing Green Onion successfully.
Other Plants That Grow in Honolulu
More plants you can grow alongside Green Onion in Honolulu
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Frequently Asked Questions
Can I grow green onion in Honolulu?
Yes! Green Onion can be successfully grown in Honolulu, US. Honolulu is in USDA Hardiness Zone 12 with a Tropical savanna climate. The difficulty level for growing Green Onion here is rated "easy". The best months to plant are November, December, January, February, March.
When should I plant green onion in Honolulu?
In Honolulu, the recommended planting months for Green Onion are November, December, January, February, March. Honolulu has 365 frost-free days per year, with winter lows of 19°C and summer highs of 31°C. Green Onion is frost tolerant, giving you more flexibility with planting dates.
How long does green onion take to grow in Honolulu?
Green Onion typically takes 20-30 days from planting to harvest. In Honolulu's Tropical savanna climate with 365 frost-free days, you have plenty of time to grow Green Onion to maturity. Can regrow from store-bought roots in water. Succession plant every 2 weeks. Can be planted 2-3 weeks before the last expected frost, giving it a head start on the growing season. Aim for about 2.5 cm of water per week, adjusting for rainfall. Organic mulch around the base helps maintain even moisture.
Can I grow green onion indoors in Honolulu?
Green Onion can potentially be grown indoors in Honolulu 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 Nov, Dec, Jan, Feb, Mar outdoor planting window. Use containers with good drainage and regular watering.
What month do I plant green onion in Honolulu?
Plant Green Onion in Honolulu during November, December, January, February, March. These are the optimal months based on Honolulu's USDA Zone 12 climate, 365 frost-free days, and temperature range of 19°C to 31°C.
Is green onion hard to grow in Honolulu?
Green Onion is rated "easy" to grow in Honolulu. This is a great choice for beginners — it is forgiving and adapts well to this climate. The climate match for Green Onion in Honolulu is Moderate.
What grows well with green onion in Honolulu?
In Honolulu, you can grow many companion plants alongside Green Onion. Good options from the same planting window include Tomato, Basil, Lettuce, Carrot and 2 more. These plants share similar planting months and thrive in Honolulu's Zone 12 climate.
Does green onion need full sun in Honolulu?
Green Onion requires full sun. In Honolulu, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.