Zone 9b planting calendar

What to plant in August: zone 9b

A rule-of-thumb starting point for zone 9b: last spring frost around February 15, first fall frost around December 15. Zones are set by winter lows, not frost dates, so two gardens in the same zone can be weeks apart. Measure your ZIP below for dates from your area's own 30-year record.

These are zone-average dates. Check an area-level frost estimate from thirty years of nearby weather history and this calendar retimes itself.
Typical last frost: February 15
Typical first frost: December 15
Winter lows: 25 to 30 °F
Zone 9b Almanac. What growers here actually recorded: sowing weeks, days to first pick, and yields.

Plan & order

  • Order fall seedaround Aug 17

    Fall brassicas and greens get sown in the heat of summer. Have the seed on hand before that window opens.

Start indoors for fall

  • Broccoliaround Aug 20

    Fall broccoli window opens. Sow trays any time in the next four weeks.

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