DibbleSeed starting calendar for Zone 3
Zone 3's last spring frost lands around May 18 in a typical year. The windows below are the best stretches to start each crop indoors, from the same climate engine the Dibble app uses. Move the seedlings out when the transplant window opens.
Short, cool season. Start most warm crops indoors and protect from late frosts.
16 crops, in the order they need starting. Crops the engine rules out for Zone 3, or that do not need an indoor start there, are left off; each name opens its full dated page.
Seed starting calendar for Zone 3
Last spring frost around May 18. dibblegarden.com
| Crop | Start indoors | Move outside | Days to maturity |
|---|---|---|---|
| Leek | Feb 28 to Apr 24 | Apr 25 to Jun 19 | 120 |
| Celery | Mar 1 to Mar 29 | May 10 to Jun 7 | 120 |
| Onion | Mar 5 to Mar 27 | Apr 30 to May 22 | 100 |
| Parsley | Mar 5 to Jun 8 | Apr 30 to Aug 3 | 75 |
| Brussels Sprouts | Mar 20 to May 24 | May 1 to Jul 5 | 100 |
| Kale | Mar 21 to Jul 30 | Apr 18 to Aug 27 | 60 |
| Collard Greens | Mar 24 to Jul 26 | Apr 21 to Aug 23 | 60 |
| Cabbage | Mar 28 to Jul 11 | Apr 25 to Aug 8 | 70 |
| Pepper | Mar 29 to Apr 5 | Jun 7 to Jun 14 | 70 |
| Hot Pepper | Mar 30 to Apr 7 | Jun 8 to Jun 16 | 80 |
| Broccoli | Apr 2 to Jul 12 | Apr 30 to Aug 9 | 65 |
| Tomato | Apr 22 to May 5 | Jun 10 to Jun 23 | 75 |
| Marigold | Apr 30 to Jun 10 | Jun 11 to Jul 22 | 50 |
| Cauliflower | Apr 30 to Jul 3 | May 28 to Jul 31 | 70 |
| Tomatillo | May 6 to May 23 | Jun 10 to Jun 27 | 75 |
| Basil | May 7 to Jun 24 | Jun 11 to Jul 29 | 60 |
Other zones
Plant at the right time this season
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