Planting Calendar for ZIP 99137
Based on your local frost dates - last spring frost around May 16, first fall frost around Sep 15 - here is when to plant 79 common crops near ZIP 99137.
Last spring frost
May 16
First fall frost
Sep 15
Hardiness zone
6b
Vegetables
| Crop | Start seeds indoors | Plant outside | Fall planting by |
|---|---|---|---|
| Tomatoes | Apr 4 | May 23 (Transplant out) | - |
| Peppers | Mar 21 | May 30 (Transplant out) | - |
| Cucumbers | Apr 25 | May 23 (Transplant out) | Jul 8 |
| Zucchini | Apr 25 | May 23 (Transplant out) | Jul 13 |
| Summer Squash | Apr 25 | May 23 (Transplant out) | Jul 11 |
| Winter Squash | Apr 25 | May 23 (Transplant out) | - |
| Pumpkins | Apr 25 | May 23 (Transplant out) | - |
| Green Beans | - | May 16 (Direct sow) | Jul 8 |
| Sweet Corn | - | May 23 (Direct sow) | - |
| Melons | Apr 25 | May 30 (Transplant out) | - |
| Watermelon | Apr 25 | May 30 (Transplant out) | - |
| Okra | - | May 30 (Direct sow) | - |
| Eggplant | Mar 21 | May 30 (Transplant out) | - |
| Lettuce | Apr 18 | Apr 18 (Transplant out) | Jul 13 |
| Spinach | - | Apr 4 (Direct sow) | Jul 18 |
| Kale | Apr 4 | Apr 25 (Transplant out) | Jul 8 |
| Peas | - | Apr 4 (Direct sow) | Jul 3 |
| Carrots | - | Apr 25 (Direct sow) | Jun 23 |
| Beets | - | Apr 18 (Direct sow) | Jul 8 |
| Radishes | - | Apr 18 (Direct sow) | Aug 4 |
| Broccoli | Apr 4 | May 2 (Transplant out) | Jun 28 |
| Cauliflower | Apr 4 | May 2 (Transplant out) | Jun 23 |
| Cabbage | Apr 4 | Apr 25 (Transplant out) | Jun 23 |
| Onions | Mar 7 | Apr 18 (Transplant out) | - |
| Potatoes | - | May 2 (Direct sow) | - |
| Swiss Chard | Apr 18 | May 2 (Transplant out) | Jul 8 |
| Sweet Potatoes | - | Jun 6 (Direct sow) | - |
| Brussels Sprouts | Apr 4 | May 2 (Transplant out) | May 24 |
| Celery | Mar 7 | May 23 (Transplant out) | - |
| Leeks | Mar 7 | May 2 (Transplant out) | May 4 |
| Turnips | - | May 2 (Direct sow) | Jul 13 |
| Rutabaga | - | May 16 (Direct sow) | May 29 |
| Parsnips | - | May 2 (Direct sow) | May 4 |
| Kohlrabi | Apr 18 | May 2 (Transplant out) | Jul 8 |
| Collard Greens | Apr 4 | May 2 (Transplant out) | Jun 28 |
| Mustard Greens | - | May 2 (Direct sow) | Jul 18 |
| Arugula | - | May 2 (Direct sow) | Jul 23 |
| Bok Choy | Apr 18 | May 2 (Transplant out) | Jul 13 |
| Green Onions | - | May 2 (Direct sow) | Jul 3 |
| Tomatillos | Apr 4 | May 23 (Transplant out) | - |
| Fennel | Apr 18 | May 2 (Transplant out) | Jun 13 |
| Popcorn | May 16 | May 30 (Transplant out) | - |
| Black-Eyed Peas | May 16 | May 30 (Transplant out) | Jun 13 |
| Lima Beans | May 16 | May 30 (Transplant out) | - |
| Edamame | May 16 | May 30 (Transplant out) | - |
| Peanuts | May 16 | May 30 (Transplant out) | - |
| Globe Artichoke | Mar 21 | May 2 (Transplant out) | Jun 3 |
| Horseradish | May 16 | May 2 (Transplant out) | - |
| Ground Cherries | Apr 4 | May 30 (Transplant out) | - |
| Radicchio | Apr 11 | May 2 (Transplant out) | Jun 23 |
| Endive | Apr 11 | May 2 (Transplant out) | Jun 3 |
| Watercress | Apr 25 | May 2 (Transplant out) | Jul 3 |
| Sorrel | Apr 4 | Apr 25 (Transplant out) | Jul 3 |
| Sunchokes | May 16 | May 2 (Transplant out) | - |
| Malabar Spinach | Apr 4 | May 30 (Transplant out) | - |
| Amaranth Greens | Apr 25 | May 30 (Transplant out) | Jul 18 |
| Luffa Gourd | Apr 4 | May 30 (Transplant out) | - |
| New Zealand Spinach | Apr 18 | May 30 (Transplant out) | - |
| Fava Beans | May 16 | Apr 18 (Transplant out) | Jun 8 |
| Chayote | Apr 18 | May 30 (Transplant out) | - |
| Corn Salad | May 16 | Apr 18 (Transplant out) | Jul 3 |
| Bitter Melon | Apr 18 | May 30 (Transplant out) | - |
| Cardoon | Apr 4 | May 16 (Transplant out) | - |
Herbs
| Crop | Start seeds indoors | Plant outside | Fall planting by |
|---|---|---|---|
| Basil | Apr 4 | May 23 (Transplant out) | - |
| Cilantro | - | May 2 (Direct sow) | Jul 13 |
| Parsley | Mar 21 | May 30 (Transplant out) | Jun 18 |
| Dill | - | May 23 (Direct sow) | Jul 3 |
| Lemon Balm | Apr 4 | May 16 (Transplant out) | - |
| Borage | May 16 | May 16 (Transplant out) | Jul 8 |
| Chervil | May 16 | Apr 25 (Transplant out) | Jul 8 |
| Lemongrass | Mar 21 | May 30 (Transplant out) | - |
| Summer Savory | Apr 4 | May 16 (Transplant out) | - |
| Marjoram | Apr 4 | May 23 (Transplant out) | - |
| Lovage | Apr 4 | May 16 (Transplant out) | Jun 3 |
| Anise Hyssop | Mar 21 | May 16 (Transplant out) | - |
| Shiso | Apr 4 | May 23 (Transplant out) | - |
| Stevia | Mar 21 | May 30 (Transplant out) | - |
| Chamomile | Apr 4 | May 2 (Transplant out) | Jun 28 |
| Tarragon | May 16 | May 16 (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 Chewelah, Wa, 19.3 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.