State × crop calendar
Brassicas planting in Hawaii.
- Secondary crop
- Zone 11a
- 365-day season
- Last frost January 1
- Cover Crop
- Frost Hardy
Brassicas planting in Hawaii is shaped by the state's 11a dominant hardiness zone, last frost date around January 1, and a 365-day growing season. Brassicas is grown in Hawaii but is not a dominant crop — works for home gardens, food plots, and some commercial production.
Planting dates on this page are climatological estimates from USDA frost-date norms and zone-typical planting offsets. Verify against University of Hawaii College of Tropical Agriculture for variety- and county-specific guidance.
Planting calendar — 2026
Frost-anchored windows.
Brassicas · Hawaii · planting calendar
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.
Planting windows
Earliest → ideal → latest.
Fall planting
BrassicasEarliest
October 2
Ideal start
October 17
Ideal end
November 1
Latest
November 16
Soil-temp trigger
Late summer planting for fall food plot — 60-90 days before first hard frost provides peak forage value before deer season.Harvest window
Typical start
December 16
Typical end
January 15
Harvest timing varies with planting date and seasonal weather — these dates are typical for the ideal planting window.
Growing notes
Brassicas can be successfully grown in Hawaii with attention to variety selection. The state's 365-day growing season requires choosing varieties appropriate for the growing window.
Brassicas is grown in Hawaii but is not a dominant crop — works for home gardens, food plots, and some commercial production.
Agronomy reference
Brassicas fundamentals.
Soil-temp minimum
45°F
Soil-temp optimum
55–80°F
Days to maturity
60–90
Water (in/wk)
0.5–1"
Soil pH
6–7.5
Nitrogen demand
moderate
Late summer / early fall planting timing is critical for food plots — plants need 60-90 days of growth before first hard frost to reach peak forage value.
Common pests to watch
- Diamondback moth
- Cabbage worms
- Flea beetles
Pest pressure varies by region and year. Confirm current outbreaks with University of Hawaii College of Tropical Agriculture.
Common diseases
- Black rot
- Clubroot
- Alternaria leaf spot
Resistance varieties shift each year. Check the current variety trial report for your state.
Variety selection
Brassicas varieties for Hawaii live with your extension.
Variety selection
Variety performance is micro-regional and changes with each year's trial cycle. We don't republish variety lists — instead, we point directly at the source.
University of Hawaii College of Tropical Agriculture →Search the extension site for “brassicas variety trial” or “recommended brassicas varieties” to find the current report.
Yield varies significantly by variety, soil, fertility, and management. Consult your state extension service for variety performance trials in your region.
Brassicas timing. Live alerts.
Bield: Farm ties weather and soil-temperature stations in your county to crop planting thresholds — get notified the day soil temp clears your target window.
Start free trial →