When to plant rosemary 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 rosemary.
Note: winters in zone 4a are usually too cold for rosemary to survive outdoors. Grow it in a large pot and move it into a garage or indoors for winter.
Your rosemary calendar for zone 4a
- May 19: Plant rosemary in the bed
- Aug 7: Start picking rosemary
Hardy outdoors in zone 7 and warmer. In colder areas, grow it in a pot and bring it in for winter.
Spacing in a raised bed: 1 plant per 2 × 2 ft.
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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