When to plant Swiss Chard in Zone 3b
In Zone 3b, Swiss Chard: direct sow outdoors around May 6–Jun 3. Expect to harvest around Jun 30–Jul 28.
| Step | When |
|---|---|
| Direct sow outdoors | May 6 – Jun 3 |
| Harvest | Jun 30 – Jul 28 |
Tip: Heat- and cold-tolerant; pick outer leaves and it keeps producing all season.
Zone 3b averages a last spring frost around May 20 and a first fall frost around Sep 12. These are zone averages — look up your ZIP for your exact area.
See the full Zone 3b calendar in the tool →