
When to plant basil in zone 4a
In zone 4a, the last spring frost usually comes around May 12 and the first fall frost around Sep 21. Here is when to plant basil.
Start seeds indoorsMar 31
Plant in the bedMay 26
Start pickingJul 25
Your basil calendar for zone 4a
- Mar 31: Start basil seeds indoors (or buy plants later)
- May 26: Plant basil in the bed
- Jul 25: Start picking basil
Pinch off flower buds so it keeps making leaves. Grows well next to tomatoes.
Spacing in a raised bed: 4 plants per square foot.
These dates are estimates from the average frost dates for zone 4a. Your local frost dates may be a week or two different. If a late cold snap is forecast, wait a few days.
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