When to plant Sweet Pea in Zone 4b
In Zone 4b, Sweet Pea: direct sow outdoors around Mar 29–Apr 19. Expect to harvest around Jun 17–Jul 8.
| Step | When |
|---|---|
| Direct sow outdoors | Mar 29 – Apr 19 |
| Harvest | Jun 17 – Jul 8 |
Tip: A cool-season climber — sow early, give it a trellis, and keep picking to prolong bloom.
Zone 4b averages a last spring frost around May 10 and a first fall frost around Sep 22. These are zone averages — look up your ZIP for your exact area.
See the full Zone 4b calendar in the tool →