Zone 10a planting calendar

What to plant in March: zone 10a

A rule-of-thumb starting point for zone 10a: last spring frost around January 30, first fall frost around December 25. 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: January 30
Typical first frost: December 25
Winter lows: 30 to 35 °F
Zone 10a Almanac. What growers here actually recorded: sowing weeks, days to first pick, and yields.

Succession sow

  • Cucumber2 sowings: Mar 6 and Mar 27

    Sowing 2: replant every 21 days so one planting never has to feed you all season. Sowing again a few weeks later keeps the harvest coming instead of arriving all at once.

  • Zucchini2 sowings: Mar 6 and Mar 27

    Sowing 2: replant every 21 days so one planting never has to feed you all season. Sowing again a few weeks later keeps the harvest coming instead of arriving all at once.

  • Basil2 sowings: Mar 6 and Mar 27

    Sowing 2: replant every 21 days so one planting never has to feed you all season. Sowing again a few weeks later keeps the harvest coming instead of arriving all at once.

  • Bush bean2 sowings: Mar 13 and Mar 27

    Sowing 3: replant every 14 days so one planting never has to feed you all season. Sowing again a few weeks later keeps the harvest coming instead of arriving all at once.

  • Winter squasharound Mar 13

    Sowing 2: replant every 21 days so one planting never has to feed you all season.

  • Sweet corn2 sowings: Mar 13 and Mar 27

    Sowing 3: replant every 14 days so one planting never has to feed you all season. Sowing again a few weeks later keeps the harvest coming instead of arriving all at once.

  • Beetaround Mar 20

    Sowing 2: replant every 21 days so one planting never has to feed you all season.

  • Carrotaround Mar 20

    Sowing 2: replant every 21 days so one planting never has to feed you all season.

Garden care

  • Side-dress heavy feeders3 sowings: Mar 13 and Mar 20 and Mar 27

    Tomatoes, peppers, corn and squash get compost or fish emulsion once fruit sets. Sowing again a few weeks later keeps the harvest coming instead of arriving all at once.

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