When to plant Snapdragon in Zone 3b
In Zone 3b, Snapdragon: start seeds indoors around Mar 25–Apr 8; transplant outdoors around May 6–May 20. Expect to harvest around Aug 4–Aug 18.
| Step | When |
|---|---|
| Start seeds indoors | Mar 25 – Apr 8 |
| Transplant outdoors | May 6 – May 20 |
| Harvest | Aug 4 – Aug 18 |
Tip: Cool-tolerant; transplant a bit before the last frost. Pinch tips for bushier, multi-stem plants.
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 →