Planting windows for Blackduck
Computed from Blackduck's own frost dates. Click any crop for the full zone-4 growing guide — varieties, spacing, fall plantings, and more.
| Crop | Start seeds indoors | Transplant | Direct sow |
|---|---|---|---|
| 🍅 Tomatoes | Mar 29 – Apr 12 | May 31 – Jun 7 | — |
| 🫑 Peppers | Mar 15 – Mar 29 | Jun 7 – Jun 14 | — |
| 🥬 Lettuce | Apr 12 – Apr 26 | Apr 26 – May 10 | Apr 26 – May 24 |
| 🫛 Peas | — | — | Apr 12 – Apr 26 |
| 🥕 Carrots | — | — | May 3 – May 24 |
| 🥦 Broccoli | Apr 5 – Apr 19 | May 3 – May 17 | — |
| 🥬 Kale | Apr 12 – Apr 26 | Apr 26 – May 10 | Apr 26 – May 10 |
| 🥒 Cucumbers | Apr 26 – May 3 | May 31 – Jun 7 | May 31 – Jun 7 |
| 🥒 Zucchini | Apr 26 – May 3 | May 31 – Jun 7 | May 31 – Jun 7 |
| 🫘 Green Beans (Bush) | — | — | May 31 – Jun 7 |
| 🌽 Sweet Corn | — | — | May 31 – Jun 7 |
| 🌿 Basil | Apr 12 – Apr 26 | May 31 – Jun 7 | Jun 7 – Jun 14 |
| 🧄 Garlic | — | — | Fall: Aug 6 – Sep 3 |
Want this for all 50 crops, or as a printable seed-shelf schedule? Use the planting calendar and the seed starting scheduler — both can use Blackduck's dates automatically after a lookup.
Reading the season in Blackduck
At about 116 frost-free days, Blackduck rewards efficiency: start warm-season crops indoors, favor short-season varieties, and lean on cold-tolerant crops — peas, kale, roots — that shrug off the shoulder-season frosts on either end.