Growing Kohlrabi in Honolulu
🇺🇸 Zone 12 Planting Guide · Tropical savanna climate
Quick Answer: Growing Kohlrabi in Honolulu
Yes, you can grow Kohlrabi in Honolulu, US! Plant during Nov, Dec, Jan, Feb 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 medium, and Kohlrabi takes 45-60 days to harvest. Kohlrabi needs full sun and regular watering.
Climate Match Analysis
Honolulu's climate requires careful timing. Summer highs (31°C) exceed Kohlrabi's maximum (24°C), so plant early or provide shade. Follow the recommended planting months for success.
Honolulu Climate Data
Kohlrabi Planting Calendar for Honolulu
Green months show the best time to plant Kohlrabi in Honolulu
Kohlrabi Growing Requirements
Sunlight
Full Sun
6+ hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
45-60
From planting to first harvest
Difficulty
Some experience helpful
💡 Growing Tips for Kohlrabi
Harvest when tennis-ball sized. Larger ones become woody. 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: Kohlrabi is frost tolerant — you can plant earlier in spring.
How to Grow Kohlrabi 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. Kohlrabi grows well with some gardening knowledge in this climate.
Kohlrabi thrives in temperatures between 10°C and 20°C, requiring full sun and regular watering. In Honolulu, the best months to plant Kohlrabi are November, December, January, February. Since Kohlrabi can tolerate frost, you have flexibility to plant earlier in the season or extend into cooler months. Expect to harvest in approximately 45-60 days after planting.
Honolulu receives only 434mm of annual rainfall, so consistent irrigation will be essential for growing Kohlrabi successfully.
Other Plants That Grow in Honolulu
More plants you can grow alongside Kohlrabi in Honolulu
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Frequently Asked Questions
Can I grow kohlrabi in Honolulu?
Yes! Kohlrabi can be successfully grown in Honolulu, US. Honolulu is in USDA Hardiness Zone 12 with a Tropical savanna climate. The difficulty level for growing Kohlrabi here is rated "medium". The best months to plant are November, December, January, February.
When should I plant kohlrabi in Honolulu?
In Honolulu, the recommended planting months for Kohlrabi are November, December, January, February. Honolulu has 365 frost-free days per year, with winter lows of 19°C and summer highs of 31°C. Kohlrabi is frost tolerant, giving you more flexibility with planting dates.
How long does kohlrabi take to grow in Honolulu?
Kohlrabi typically takes 45-60 days from planting to harvest. In Honolulu's Tropical savanna climate with 365 frost-free days, you have plenty of time to grow Kohlrabi to maturity. Harvest when tennis-ball sized. Larger ones become woody. 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 kohlrabi indoors in Honolulu?
Kohlrabi 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 outdoor planting window. Use containers with good drainage and regular watering.
What month do I plant kohlrabi in Honolulu?
Plant Kohlrabi in Honolulu during November, December, January, February. 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 kohlrabi hard to grow in Honolulu?
Kohlrabi is rated "medium" to grow in Honolulu. Some gardening experience is helpful. Pay attention to watering schedules and planting timing. The climate match for Kohlrabi in Honolulu is Moderate.
What grows well with kohlrabi in Honolulu?
In Honolulu, you can grow many companion plants alongside Kohlrabi. 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 kohlrabi need full sun in Honolulu?
Kohlrabi requires full sun. In Honolulu, provide at least 6 hours of direct sunlight daily. Most garden locations with southern exposure will work well.