Planting windows for Harlowton
Computed from Harlowton'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 28 – Apr 11 | May 30 – Jun 6 | — |
| 🫑 Peppers | Mar 14 – Mar 28 | Jun 6 – Jun 13 | — |
| 🥬 Lettuce | Apr 11 – Apr 25 | Apr 25 – May 9 | Apr 25 – May 23 |
| 🫛 Peas | — | — | Apr 11 – Apr 25 |
| 🥕 Carrots | — | — | May 2 – May 23 |
| 🥦 Broccoli | Apr 4 – Apr 18 | May 2 – May 16 | — |
| 🥬 Kale | Apr 11 – Apr 25 | Apr 25 – May 9 | Apr 25 – May 9 |
| 🥒 Cucumbers | Apr 25 – May 2 | May 30 – Jun 6 | May 30 – Jun 6 |
| 🥒 Zucchini | Apr 25 – May 2 | May 30 – Jun 6 | May 30 – Jun 6 |
| 🫘 Green Beans (Bush) | — | — | May 30 – Jun 6 |
| 🌽 Sweet Corn | — | — | May 30 – Jun 6 |
| 🌿 Basil | Apr 11 – Apr 25 | May 30 – Jun 6 | Jun 6 – Jun 13 |
| 🧄 Garlic | — | — | Fall: Aug 5 – Sep 2 |
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 Harlowton's dates automatically after a lookup.
Reading the season in Harlowton
At about 116 frost-free days, Harlowton 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.