Planting Calendar for ZIP 81635
Based on your local frost dates - last spring frost around May 25, first fall frost around Sep 25 - here is when to plant 79 common crops near ZIP 81635.
Last spring frost
May 25
First fall frost
Sep 25
Hardiness zone
6a
Vegetables
| Crop | Start seeds indoors | Plant outside | Fall planting by |
|---|---|---|---|
| Tomatoes | Apr 13 | Jun 1 (Transplant out) | - |
| Peppers | Mar 30 | Jun 8 (Transplant out) | - |
| Cucumbers | May 4 | Jun 1 (Transplant out) | Jul 18 |
| Zucchini | May 4 | Jun 1 (Transplant out) | Jul 23 |
| Summer Squash | May 4 | Jun 1 (Transplant out) | Jul 21 |
| Winter Squash | May 4 | Jun 1 (Transplant out) | - |
| Pumpkins | May 4 | Jun 1 (Transplant out) | - |
| Green Beans | - | May 25 (Direct sow) | Jul 18 |
| Sweet Corn | - | Jun 1 (Direct sow) | - |
| Melons | May 4 | Jun 8 (Transplant out) | - |
| Watermelon | May 4 | Jun 8 (Transplant out) | - |
| Okra | - | Jun 8 (Direct sow) | - |
| Eggplant | Mar 30 | Jun 8 (Transplant out) | - |
| Lettuce | Apr 27 | Apr 27 (Transplant out) | Jul 23 |
| Spinach | - | Apr 13 (Direct sow) | Jul 28 |
| Kale | Apr 13 | May 4 (Transplant out) | Jul 18 |
| Peas | - | Apr 13 (Direct sow) | Jul 13 |
| Carrots | - | May 4 (Direct sow) | Jul 3 |
| Beets | - | Apr 27 (Direct sow) | Jul 18 |
| Radishes | - | Apr 27 (Direct sow) | Aug 14 |
| Broccoli | Apr 13 | May 11 (Transplant out) | Jul 8 |
| Cauliflower | Apr 13 | May 11 (Transplant out) | Jul 3 |
| Cabbage | Apr 13 | May 4 (Transplant out) | Jul 3 |
| Onions | Mar 16 | Apr 27 (Transplant out) | - |
| Potatoes | - | May 11 (Direct sow) | - |
| Swiss Chard | Apr 27 | May 11 (Transplant out) | Jul 18 |
| Sweet Potatoes | - | Jun 15 (Direct sow) | - |
| Brussels Sprouts | Apr 13 | May 11 (Transplant out) | Jun 3 |
| Celery | Mar 16 | Jun 1 (Transplant out) | - |
| Leeks | Mar 16 | May 11 (Transplant out) | May 14 |
| Turnips | - | May 11 (Direct sow) | Jul 23 |
| Rutabaga | - | May 25 (Direct sow) | Jun 8 |
| Parsnips | - | May 11 (Direct sow) | May 14 |
| Kohlrabi | Apr 27 | May 11 (Transplant out) | Jul 18 |
| Collard Greens | Apr 13 | May 11 (Transplant out) | Jul 8 |
| Mustard Greens | - | May 11 (Direct sow) | Jul 28 |
| Arugula | - | May 11 (Direct sow) | Aug 2 |
| Bok Choy | Apr 27 | May 11 (Transplant out) | Jul 23 |
| Green Onions | - | May 11 (Direct sow) | Jul 13 |
| Tomatillos | Apr 13 | Jun 1 (Transplant out) | - |
| Fennel | Apr 27 | May 11 (Transplant out) | Jun 23 |
| Popcorn | May 25 | Jun 8 (Transplant out) | - |
| Black-Eyed Peas | May 25 | Jun 8 (Transplant out) | Jun 23 |
| Lima Beans | May 25 | Jun 8 (Transplant out) | - |
| Edamame | May 25 | Jun 8 (Transplant out) | - |
| Peanuts | May 25 | Jun 8 (Transplant out) | - |
| Globe Artichoke | Mar 30 | May 11 (Transplant out) | Jun 13 |
| Horseradish | May 25 | May 11 (Transplant out) | - |
| Ground Cherries | Apr 13 | Jun 8 (Transplant out) | - |
| Radicchio | Apr 20 | May 11 (Transplant out) | Jul 3 |
| Endive | Apr 20 | May 11 (Transplant out) | Jun 13 |
| Watercress | May 4 | May 11 (Transplant out) | Jul 13 |
| Sorrel | Apr 13 | May 4 (Transplant out) | Jul 13 |
| Sunchokes | May 25 | May 11 (Transplant out) | - |
| Malabar Spinach | Apr 13 | Jun 8 (Transplant out) | - |
| Amaranth Greens | May 4 | Jun 8 (Transplant out) | Jul 28 |
| Luffa Gourd | Apr 13 | Jun 8 (Transplant out) | - |
| New Zealand Spinach | Apr 27 | Jun 8 (Transplant out) | - |
| Fava Beans | May 25 | Apr 27 (Transplant out) | Jun 18 |
| Chayote | Apr 27 | Jun 8 (Transplant out) | - |
| Corn Salad | May 25 | Apr 27 (Transplant out) | Jul 13 |
| Bitter Melon | Apr 27 | Jun 8 (Transplant out) | - |
| Cardoon | Apr 13 | May 25 (Transplant out) | - |
Herbs
| Crop | Start seeds indoors | Plant outside | Fall planting by |
|---|---|---|---|
| Basil | Apr 13 | Jun 1 (Transplant out) | - |
| Cilantro | - | May 11 (Direct sow) | Jul 23 |
| Parsley | Mar 30 | Jun 8 (Transplant out) | Jun 28 |
| Dill | - | Jun 1 (Direct sow) | Jul 13 |
| Lemon Balm | Apr 13 | May 25 (Transplant out) | - |
| Borage | May 25 | May 25 (Transplant out) | Jul 18 |
| Chervil | May 25 | May 4 (Transplant out) | Jul 18 |
| Lemongrass | Mar 30 | Jun 8 (Transplant out) | - |
| Summer Savory | Apr 13 | May 25 (Transplant out) | - |
| Marjoram | Apr 13 | Jun 1 (Transplant out) | - |
| Lovage | Apr 13 | May 25 (Transplant out) | Jun 13 |
| Anise Hyssop | Mar 30 | May 25 (Transplant out) | - |
| Shiso | Apr 13 | Jun 1 (Transplant out) | - |
| Stevia | Mar 30 | Jun 8 (Transplant out) | - |
| Chamomile | Apr 13 | May 11 (Transplant out) | Jul 8 |
| Tarragon | May 25 | May 25 (Transplant out) | - |
How to read this calendar
Start seeds indoors is when to sow in trays inside so seedlings are ready to transplant. Plant outside is when to transplant seedlings or direct-sow seed, based on frost tolerance. Fall planting by is the latest date to start a fall crop and still harvest before the first fall frost. Tender crops wait until after the last spring frost; hardy crops can go out earlier.
Computed from NOAA 1991–2020 Climate Normals at Altenbern, Co, 16.9 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.