hawaii · Crop calendar
hawaii planting calendar.
Spring and fall planting windows for 18 crops in hawaii. Extension-verified where available, USDA-sourced otherwise.
corn
limitedCorn can be grown in Hawaii with attention to season length and variety selection — primarily a specialty or experimental crop here.
Spring
December 25 earliest · January 1–January 22 ideal · February 5 latest
Wait for 50°F at 2-inch soil depth — typically 1 week after last frost in northern states; close to last frost in southern states.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
soybeans
limitedSoybeans can be grown in Hawaii with attention to season length and variety selection — primarily a specialty or experimental crop here.
Spring
January 1 earliest · January 15–February 5 ideal · February 20 latest
Wait for 50°F minimum soil temp at 2-inch depth. Soybeans planted into colder soil emerge slowly and are vulnerable to seed rot.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
winter_wheat
trialWinter Wheat is at the edge of viable range in Hawaii — short-season varieties, season extension, or specialty/trial-only production.
Fall
December 10 earliest · December 24–January 14 ideal · January 28 latest
Plant 6-8 weeks before first hard freeze for adequate fall tillering. Hessian fly free dates often dictate exact timing.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
cotton
trialCotton is at the edge of viable range in Hawaii — short-season varieties, season extension, or specialty/trial-only production.
Spring
January 8 earliest · January 15–February 5 ideal · February 26 latest
Wait for 65°F minimum soil temp at 2-inch depth, sustained for 3-5 days. Cotton emerges very slowly below this threshold.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
grain_sorghum
limitedGrain Sorghum can be grown in Hawaii with attention to season length and variety selection — primarily a specialty or experimental crop here.
Spring
January 15 earliest · January 22–February 19 ideal · March 11 latest
Wait for 65°F minimum soil temp. Sorghum is heat-loving and tolerates planting up to 2 months after corn.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
sunflowers
limitedSunflowers can be grown in Hawaii with attention to season length and variety selection — primarily a specialty or experimental crop here.
Spring
December 25 earliest · January 8–February 5 ideal · February 26 latest
Wait for 50°F minimum soil temp. Sunflowers tolerate light frost in seedling stage but not after stem elongation.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
tomatoes
secondaryTomatoes is grown in Hawaii but is not a dominant crop — works for home gardens, food plots, and some commercial production.
Spring
January 8 earliest · January 15–February 5 ideal · February 26 latest
Transplant after last frost when soil reaches 60°F. Garden centers typically have transplants 1-2 weeks before this window.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
sweet_corn
secondarySweet Corn is grown in Hawaii but is not a dominant crop — works for home gardens, food plots, and some commercial production.
Spring
December 25 earliest · January 1–February 5 ideal · February 26 latest
Wait for 55°F at 2-inch depth. Succession plant every 10-14 days for extended harvest.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
potatoes
primaryPotatoes is widely grown in Hawaii — commercially significant or common in home gardens and food plots.
Spring
December 11 earliest · December 18–January 8 ideal · January 22 latest
Plant when soil reaches 45°F at 4-inch depth — often 2-4 weeks before last frost. Cool-season crop.
Fall
October 2 earliest · October 17–November 1 ideal · November 16 latest
Plant when soil reaches 45°F at 4-inch depth — often 2-4 weeks before last frost. Cool-season crop.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
peppers
secondaryPeppers is grown in Hawaii but is not a dominant crop — works for home gardens, food plots, and some commercial production.
Spring
January 15 earliest · January 22–February 12 ideal · March 4 latest
Transplant when soil reaches 65°F at 2-inch depth — typically 2 weeks after last frost. Peppers are even more cold-sensitive than tomatoes.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
cucumbers
secondaryCucumbers is grown in Hawaii but is not a dominant crop — works for home gardens, food plots, and some commercial production.
Spring
January 8 earliest · January 15–February 19 ideal · March 11 latest
Direct seed when soil reaches 60°F at 2-inch depth. Cool soils slow germination dramatically.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
pumpkins
secondaryPumpkins is grown in Hawaii but is not a dominant crop — works for home gardens, food plots, and some commercial production.
Spring
January 15 earliest · January 22–February 19 ideal · March 4 latest
Direct seed when soil reaches 60°F. Plan harvest date first — count back 90-110 days from desired harvest.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
alfalfa
limitedAlfalfa can be grown in Hawaii with attention to season length and variety selection — primarily a specialty or experimental crop here.
Spring
December 11 earliest · December 25–January 22 ideal · February 12 latest
Spring seeding: cool-season germination at 45°F+. Fall seeding: 60-90 days before first hard freeze for establishment.
Fall
October 17 earliest · November 1–November 16 ideal · December 1 latest
Spring seeding: cool-season germination at 45°F+. Fall seeding: 60-90 days before first hard freeze for establishment.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
clover
primaryClover is widely grown in Hawaii — commercially significant or common in home gardens and food plots.
Spring
November 27 earliest · December 11–January 8 ideal · January 29 latest
Frost-seed onto frozen ground in late winter for natural soil incorporation. Fall-seed in southern states for over-winter establishment.
Fall
October 17 earliest · November 1–November 16 ideal · December 1 latest
Frost-seed onto frozen ground in late winter for natural soil incorporation. Fall-seed in southern states for over-winter establishment.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
brassicas
secondaryBrassicas is grown in Hawaii but is not a dominant crop — works for home gardens, food plots, and some commercial production.
Fall
October 2 earliest · October 17–November 1 ideal · November 16 latest
Late summer planting for fall food plot — 60-90 days before first hard frost provides peak forage value before deer season.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
winter_rye
limitedWinter Rye can be grown in Hawaii with attention to season length and variety selection — primarily a specialty or experimental crop here.
Fall
December 10 earliest · December 24–January 14 ideal · January 28 latest
Most cold-tolerant cereal — germinates at 38°F. Plant 4-6 weeks before first hard freeze for maximum fall establishment.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
cereal_oats
secondaryCereal Oats is grown in Hawaii but is not a dominant crop — works for home gardens, food plots, and some commercial production.
Spring
December 11 earliest · December 25–January 22 ideal · February 12 latest
Spring oats: plant as soon as soil can be worked. Fall oats: 60-75 days before first hard freeze — winter-killed in northern states.
Fall
October 17 earliest · November 1–November 16 ideal · December 3 latest
Spring oats: plant as soon as soil can be worked. Fall oats: 60-75 days before first hard freeze — winter-killed in northern states.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
buckwheat
limitedBuckwheat can be grown in Hawaii with attention to season length and variety selection — primarily a specialty or experimental crop here.
Spring
February 5 earliest · February 26–March 25 ideal · April 15 latest
Wait for 50°F minimum soil temp. Plant summer for 70-90 day cover crop or food plot rotation.
Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.
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