When to plant blackberries 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 blackberries.
Note: winters in zone 4a are usually too cold for blackberries to survive outdoors. Grow it in a large pot and move it into a garage or indoors for winter.
Your blackberry (thornless) calendar for zone 4a
- Apr 14: Plant blackberries in the bed (first harvest next year)
Tie canes to a simple wire or trellis. First good crop the second summer.
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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