April · USDA Zone 10
springWhat to plant in April in USDA zone 10
Spring planting guide for zone 10 (South Florida, Coastal Southern California, Hawaii (parts)) — a 365-day growing season with last frost around frost rare or never and first frost around frost rare or never.
Sow outdoors in April — zone 10
Direct-sow these seeds into prepared garden beds or large containers. Soil temperature matters more than the calendar date — wait for a sustained warm-up before sowing tender crops.
- Okra, southern peas, sweet potatoes, hot peppers
- Tropical herbs (basil, Thai basil, lemongrass)
Harvest in April — zone 10
These crops should be ready or in active harvest in April for zone 10 gardens. Pick fruiting crops every 2-3 days to keep production going.
- Cool-season crops finishing — lettuce, peas, brassicas
Maintenance in April — zone 10
- Install shade cloth for tomatoes and peppers
Universal April tasks
These apply across most US and UK gardens in April, regardless of zone.
- Harden off transplants before moving them outdoors — 7-10 days.
- Direct-sow carrots, beets, lettuce, peas, and brassicas.
- Start cucumbers, squash, melons, and basil indoors (zones 3-5).
- Plant asparagus, rhubarb, strawberries, and bare-root fruit trees.
- Set up trellises, tomato cages, and row cover hoops.
- Mulch perennial beds once soil has warmed to 10 °C.
Why this works for zone 10
Zone 10 has average annual minimum temperatures of 30 to 40°F (-1 to 4°C) and a frost-free window from frost rare or never to frost rare or never — about 365 growing days. Summer can be too hot for many tomato varieties. Winter is the prime growing season for cool-loving crops.
Dates are zone-wide averages. Local microclimates (south-facing slopes, urban heat, lakeside warmth, elevation) can shift the window by 1-2 weeks within the same zone.
UK gardeners — April
April is the UK's main sowing month. Direct-sow carrots, beetroot, lettuce, peas, salad leaves, radishes, spring onions. Plant maincrop potatoes. Sow runner and French beans indoors. Last frost passes in much of the south by month's end — H5 gardens can risk tender transplants under fleece.
Source and methodology
Frost-date averages from NOAA Climate Data Online within USDA zone 10. Hardiness boundaries from the USDA Plant Hardiness Zone Map (2023). Crop timing curated against US Cooperative Extension Service publications (UNL, UMN, NC State, Texas A&M, UF/IFAS, Oregon State) and cross-referenced against the RHS sowing calendar. Curated by the Growli editorial team.
Keep going
- ← March in zone 10
- May in zone 10 →
- All zones — what to plant in April
- USDA Zone 10 — frost dates and crop list
- Full 12-month planting calendar