When to plant Sweet Pea in Zone 1b
In Zone 1b, Sweet Pea: direct sow outdoors around Apr 29–May 20. Expect to harvest around Jul 18–Aug 8.
| Step | When |
|---|---|
| Direct sow outdoors | Apr 29 – May 20 |
| Harvest | Jul 18 – Aug 8 |
Tip: A cool-season climber — sow early, give it a trellis, and keep picking to prolong bloom.
Zone 1b averages a last spring frost around Jun 10 and a first fall frost around Aug 20. These are zone averages — look up your ZIP for your exact area.
See the full Zone 1b calendar in the tool →