When to plant Snapdragon in Zone 4b
In Zone 4b, Snapdragon: start seeds indoors around Mar 15–Mar 29; transplant outdoors around Apr 26–May 10. Expect to harvest around Jul 25–Aug 8.
| Step | When |
|---|---|
| Start seeds indoors | Mar 15 – Mar 29 |
| Transplant outdoors | Apr 26 – May 10 |
| Harvest | Jul 25 – Aug 8 |
Tip: Cool-tolerant; transplant a bit before the last frost. Pinch tips for bushier, multi-stem plants.
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 →