When to plant Sweet Pea in Zone 4a
In Zone 4a, Sweet Pea: direct sow outdoors around Apr 3–Apr 24. Expect to harvest around Jun 22–Jul 13.
| Step | When |
|---|---|
| Direct sow outdoors | Apr 3 – Apr 24 |
| Harvest | Jun 22 – Jul 13 |
Tip: A cool-season climber — sow early, give it a trellis, and keep picking to prolong bloom.
Zone 4a averages a last spring frost around May 15 and a first fall frost around Sep 18. These are zone averages — look up your ZIP for your exact area.
See the full Zone 4a calendar in the tool →