Zone 10a planting calendar

What to plant in March: zone 10a

Zone 10a averages its last spring frost around January 30 and its first fall frost around December 25. Everything below is timed from those two dates, so it stays useful whether you're planting for summer or for a fall harvest.

These are zone-average dates. Check an area-level frost estimate from thirty years of nearby weather history and this calendar retimes itself.

Last frost: January 30

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

Cucumberaround Mar 6
Sowing 2: replant every 21 days so one planting never has to feed you all season.
Zucchiniaround Mar 6
Sowing 2: replant every 21 days so one planting never has to feed you all season.
Basilaround Mar 6
Sowing 2: replant every 21 days so one planting never has to feed you all season.
Bush beanaround Mar 13
Sowing 3: replant every 14 days so one planting never has to feed you all season.
Winter squasharound Mar 13
Sowing 2: replant every 21 days so one planting never has to feed you all season.
Sweet cornaround Mar 13
Sowing 3: replant every 14 days so one planting never has to feed you all season.
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.
Bush beanaround Mar 27
Sowing 4: replant every 14 days so one planting never has to feed you all season.
Cucumberaround Mar 27
Sowing 3: replant every 21 days so one planting never has to feed you all season.
Zucchiniaround Mar 27
Sowing 3: replant every 21 days so one planting never has to feed you all season.
Sweet cornaround Mar 27
Sowing 4: replant every 14 days so one planting never has to feed you all season.
Basilaround Mar 27
Sowing 3: replant every 21 days so one planting never has to feed you all season.

Garden care

Side-dress heavy feedersaround Mar 13
Tomatoes, peppers, corn and squash get compost or fish emulsion once fruit sets.
Prune and stake tomatoesaround Mar 20
Pull suckers and lower leaves for airflow. The main defense against blight in humid heat.
Shade the cool-season bedaround Mar 27
30-40% shade cloth keeps lettuce, cilantro and spinach from bolting in peak heat.

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