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Can You Grow Collard Greens in Hawaii?
US · USDA Zone 12b · zones 9b, 10a, 10b, 11a, 11b, 12a, 12b
Collard greens struggle in zones with extreme cold — they are heat and mild-frost tolerant but not deeply cold-hardy.
Plant zones
Hawaii last frost
Hawaii first frost
Days to harvest
When to plant Collard Greenses in Hawaii
Start indoors
Transplant
Harvest
Dates are approximate, based on Hawaii's average frost dates. Your exact yard may vary by microclimate.
About Collard Greens
Collard greens are a Southern staple — extremely hardy, tolerating both frost and summer heat better than most brassicas. Rich in nutrients and one of the most productive greens per square foot.
Start indoors 4-6 weeks before last frost or direct sow. Harvest lower leaves as needed. Plants withstand hard frosts — flavor improves after cold snaps. In warm zones, grow as a fall/winter crop.
Gardening in Hawaii
Hawaii is tropical with year-round warmth. Zone varies dramatically by elevation — coastal areas are Zone 11-12 while Mauna Kea slopes reach Zone 9. Year-round growing throughout.
Frequently asked questions
Can you grow Collard Greens in Hawaii?
Collard greens struggle in zones with extreme cold — they are heat and mild-frost tolerant but not deeply cold-hardy.
What zone is Hawaii?
Hawaii spans USDA Zone 12b (9b, 10a, 10b, 11a, 11b, 12a, 12b).
When do you plant Collard Greenses in Hawaii?
Plant Collard Greenses around no frost (start indoors Jan 1), harvest Mar 2 – Mar 22.