What to plant in June in USDA zone 9

Sow outdoors in June — zone 9

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 (last chance)

Harvest in June — zone 9

These crops should be ready or in active harvest in June for zone 9 gardens. Pick fruiting crops every 2-3 days to keep production going.

• Tomatoes, peppers, squash, beans, melons, citrus, garlic, onions

Maintenance in June — zone 9

• Shade tomatoes, drip irrigation, heavy mulch — Tomato fruit set slows above 32 °C nights.

Prep and planning — zone 9

• Cover crops (cowpeas, sun hemp) for fallow beds

Universal June tasks

These apply across most US and UK gardens in June, regardless of zone.

• Mulch all warm-season beds — straw, shredded leaves, or grass clippings.
• Water deeply once or twice a week instead of light daily sprinkles.
• Stake, prune, and tie up tomatoes; remove suckers on indeterminate varieties.
• Start succession sowing — bush beans, lettuce, radishes every 2-3 weeks.
• Watch for pests: aphids, flea beetles, squash bugs, cabbage moths.
• Harvest garlic scapes (hardneck varieties) in zones 5-8.

Why this works for zone 9

Zone 9 has average annual minimum temperatures of 20 to 30°F (-7 to -1°C) and a frost-free window from mid-February to early March to late November / early December — about 280 growing days. Heat-tolerant tomato varieties (Solar Fire, Heatwave II) needed for midsummer. Cool-season crops grow Oct-Apr while northern zones are dormant.

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 — June

June is the UK's sowing-and-harvesting overlap. Direct-sow French beans, runner beans, courgettes, sweetcorn, salad leaves, carrots, and beetroot. Harvest strawberries, broad beans, peas, early potatoes, and salad. Plant out leeks and brassicas.

Source and methodology

Frost-date averages from NOAA Climate Data Online within USDA zone 9. 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

• ← May in zone 9
• July in zone 9 →
• All zones — what to plant in June
• USDA Zone 9 — frost dates and crop list
• Full 12-month planting calendar

Other zones — June

• What to plant in June in zone 3
• What to plant in June in zone 4
• What to plant in June in zone 5
• What to plant in June in zone 6
• What to plant in June in zone 7
• What to plant in June in zone 8
• What to plant in June in zone 10