Growing Kale in Honolulu
🇺🇸 Zone 12 Planting Guide · Tropical savanna climate
Quick Answer: Growing Kale in Honolulu
Yes, you can grow Kale 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 Kale takes 55-75 days to harvest. Kale needs full sun to partial shade and regular watering.
Climate Match Analysis
Honolulu's climate requires careful timing. Summer highs (31°C) exceed Kale's maximum (25°C), so plant early or provide shade. Follow the recommended planting months for success.
Honolulu Climate Data
Kale Planting Calendar for Honolulu
Green months show the best time to plant Kale in Honolulu
Kale Growing Requirements
Sunlight
Full Sun to Partial Shade
2-4 hours direct sunlight
Water
Regular
Consistent moisture, 1-2 inches/week
Days to Harvest
55-75
From planting to first harvest
Difficulty
Some experience helpful
💡 Growing Tips for Kale
One of the hardiest garden crops. Can overwinter in many climates with mulch. 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: Kale is frost tolerant — you can plant earlier in spring.
Companion Plants for Kale
Find out which plants grow best alongside Kale — and which to keep apart
Grow Kale Indoors
No garden? Learn how to grow Kale indoors with our complete guide
How to Grow Kale 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. Kale grows well with some gardening knowledge in this climate.
Kale thrives in temperatures between 5°C and 20°C, requiring full sun to partial shade and regular watering. In Honolulu, the best months to plant Kale are November, December, January, February. Since Kale can tolerate frost, you have flexibility to plant earlier in the season or extend into cooler months. Expect to harvest in approximately 55-75 days after planting.
Honolulu receives only 434mm of annual rainfall, so consistent irrigation will be essential for growing Kale successfully.
Other Plants That Grow in Honolulu
More plants you can grow alongside Kale in Honolulu
Keep Exploring
Frequently Asked Questions
Can I grow kale in Honolulu?
Yes! Kale can be successfully grown in Honolulu, US. Honolulu is in USDA Hardiness Zone 12 with a Tropical savanna climate. The difficulty level for growing Kale here is rated "medium". The best months to plant are November, December, January, February.
When should I plant kale in Honolulu?
In Honolulu, the recommended planting months for Kale 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. Kale is frost tolerant, giving you more flexibility with planting dates.
How long does kale take to grow in Honolulu?
Kale typically takes 55-75 days from planting to harvest. In Honolulu's Tropical savanna climate with 365 frost-free days, you have plenty of time to grow Kale to maturity. One of the hardiest garden crops. Can overwinter in many climates with mulch. 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 kale indoors in Honolulu?
Kale can potentially be grown indoors in Honolulu with proper conditions. It requires full sun to partial shade (2-4 hours of indirect light). 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 kale in Honolulu?
Plant Kale 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 kale hard to grow in Honolulu?
Kale is rated "medium" to grow in Honolulu. Some gardening experience is helpful. Pay attention to watering schedules and planting timing. The climate match for Kale in Honolulu is Moderate.
What grows well with kale in Honolulu?
In Honolulu, you can grow many companion plants alongside Kale. 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 kale need full sun in Honolulu?
Kale requires full sun to partial shade. Kale tolerates lower light. In Honolulu, a spot with filtered or indirect light for 2-4 hours works well.