When to plant Sweet Pea in Zone 1a
In Zone 1a, Sweet Pea: direct sow outdoors around May 4–May 25. Expect to harvest around Jul 23–Aug 13.
| Step | When |
|---|---|
| Direct sow outdoors | May 4 – May 25 |
| Harvest | Jul 23 – Aug 13 |
Tip: A cool-season climber — sow early, give it a trellis, and keep picking to prolong bloom.
Zone 1a averages a last spring frost around Jun 15 and a first fall frost around Aug 15. These are zone averages — look up your ZIP for your exact area.
See the full Zone 1a calendar in the tool →