When to plant rosemary in zone 4b
In zone 4b, the last spring frost usually comes around May 8 and the first fall frost around Sep 28. Here is when to plant rosemary.
Note: winters in zone 4b 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 4b
- May 15: Plant rosemary in the bed
- Aug 3: 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 4b. 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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