What to plant in March — zone 10b
Zone 10b averages its last spring frost around January 15 and its first fall frost around December 30. Everything below is timed from those two dates, so it stays useful whether you're planting for summer or for a fall harvest.
Succession sow
- Beetaround Mar 5
Sowing 2: replant every 21 days so one planting never has to feed you all season.
- Carrotaround Mar 5
Sowing 2: replant every 21 days so one planting never has to feed you all season.
- Bush beanaround Mar 12
Sowing 4: replant every 14 days so one planting never has to feed you all season.
- Cucumberaround Mar 12
Sowing 3: replant every 21 days so one planting never has to feed you all season.
- Zucchiniaround Mar 12
Sowing 3: replant every 21 days so one planting never has to feed you all season.
- Sweet cornaround Mar 12
Sowing 4: replant every 14 days so one planting never has to feed you all season.
- Basilaround Mar 12
Sowing 3: replant every 21 days so one planting never has to feed you all season.
- Winter squasharound Mar 19
Sowing 3: replant every 21 days so one planting never has to feed you all season.
- Beetaround Mar 26
Sowing 3: replant every 21 days so one planting never has to feed you all season.
- Carrotaround Mar 26
Sowing 3: replant every 21 days so one planting never has to feed you all season.
Garden care
- Prune and stake tomatoesaround Mar 5
Pull suckers and lower leaves for airflow — the main defense against blight in humid heat.
- Shade the cool-season bedaround Mar 12
30-40% shade cloth keeps lettuce, cilantro and spinach from bolting in peak heat.
- Scout for pests weeklyaround Mar 19
Squash bugs, hornworms and cucumber beetles peak now — five minutes of hand-picking beats a rescue spray.
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