Harman US

Planting Calendar for ZIP 83657

Based on your local frost dates - last spring frost around May 31, first fall frost around Sep 16 - here is when to plant 79 common crops near ZIP 83657.

Last spring frost
May 31
First fall frost
Sep 16
Hardiness zone
7a

Vegetables

Crop Start seeds indoors Plant outside Fall planting by
Tomatoes Apr 19 Jun 7 (Transplant out) -
Peppers Apr 5 Jun 14 (Transplant out) -
Cucumbers May 10 Jun 7 (Transplant out) Jul 9
Zucchini May 10 Jun 7 (Transplant out) Jul 14
Summer Squash May 10 Jun 7 (Transplant out) Jul 12
Winter Squash May 10 Jun 7 (Transplant out) -
Pumpkins May 10 Jun 7 (Transplant out) -
Green Beans - May 31 (Direct sow) Jul 9
Sweet Corn - Jun 7 (Direct sow) -
Melons May 10 Jun 14 (Transplant out) -
Watermelon May 10 Jun 14 (Transplant out) -
Okra - Jun 14 (Direct sow) -
Eggplant Apr 5 Jun 14 (Transplant out) -
Lettuce May 3 May 3 (Transplant out) Jul 14
Spinach - Apr 19 (Direct sow) Jul 19
Kale Apr 19 May 10 (Transplant out) Jul 9
Peas - Apr 19 (Direct sow) Jul 4
Carrots - May 10 (Direct sow) Jun 24
Beets - May 3 (Direct sow) Jul 9
Radishes - May 3 (Direct sow) Aug 5
Broccoli Apr 19 May 17 (Transplant out) Jun 29
Cauliflower Apr 19 May 17 (Transplant out) Jun 24
Cabbage Apr 19 May 10 (Transplant out) Jun 24
Onions Mar 22 May 3 (Transplant out) -
Potatoes - May 17 (Direct sow) -
Swiss Chard May 3 May 17 (Transplant out) Jul 9
Sweet Potatoes - Jun 21 (Direct sow) -
Brussels Sprouts Apr 19 May 17 (Transplant out) May 25
Celery Mar 22 Jun 7 (Transplant out) -
Leeks Mar 22 May 17 (Transplant out) May 5
Turnips - May 17 (Direct sow) Jul 14
Rutabaga - May 31 (Direct sow) May 30
Parsnips - May 17 (Direct sow) May 5
Kohlrabi May 3 May 17 (Transplant out) Jul 9
Collard Greens Apr 19 May 17 (Transplant out) Jun 29
Mustard Greens - May 17 (Direct sow) Jul 19
Arugula - May 17 (Direct sow) Jul 24
Bok Choy May 3 May 17 (Transplant out) Jul 14
Green Onions - May 17 (Direct sow) Jul 4
Tomatillos Apr 19 Jun 7 (Transplant out) -
Fennel May 3 May 17 (Transplant out) Jun 14
Popcorn May 31 Jun 14 (Transplant out) -
Black-Eyed Peas May 31 Jun 14 (Transplant out) Jun 14
Lima Beans May 31 Jun 14 (Transplant out) -
Edamame May 31 Jun 14 (Transplant out) -
Peanuts May 31 Jun 14 (Transplant out) -
Globe Artichoke Apr 5 May 17 (Transplant out) Jun 4
Horseradish May 31 May 17 (Transplant out) -
Ground Cherries Apr 19 Jun 14 (Transplant out) -
Radicchio Apr 26 May 17 (Transplant out) Jun 24
Endive Apr 26 May 17 (Transplant out) Jun 4
Watercress May 10 May 17 (Transplant out) Jul 4
Sorrel Apr 19 May 10 (Transplant out) Jul 4
Sunchokes May 31 May 17 (Transplant out) -
Malabar Spinach Apr 19 Jun 14 (Transplant out) -
Amaranth Greens May 10 Jun 14 (Transplant out) Jul 19
Luffa Gourd Apr 19 Jun 14 (Transplant out) -
New Zealand Spinach May 3 Jun 14 (Transplant out) -
Fava Beans May 31 May 3 (Transplant out) Jun 9
Chayote May 3 Jun 14 (Transplant out) -
Corn Salad May 31 May 3 (Transplant out) Jul 4
Bitter Melon May 3 Jun 14 (Transplant out) -
Cardoon Apr 19 May 31 (Transplant out) -

Herbs

Crop Start seeds indoors Plant outside Fall planting by
Basil Apr 19 Jun 7 (Transplant out) -
Cilantro - May 17 (Direct sow) Jul 14
Parsley Apr 5 Jun 14 (Transplant out) Jun 19
Dill - Jun 7 (Direct sow) Jul 4
Lemon Balm Apr 19 May 31 (Transplant out) -
Borage May 31 May 31 (Transplant out) Jul 9
Chervil May 31 May 10 (Transplant out) Jul 9
Lemongrass Apr 5 Jun 14 (Transplant out) -
Summer Savory Apr 19 May 31 (Transplant out) -
Marjoram Apr 19 Jun 7 (Transplant out) -
Lovage Apr 19 May 31 (Transplant out) Jun 4
Anise Hyssop Apr 5 May 31 (Transplant out) -
Shiso Apr 19 Jun 7 (Transplant out) -
Stevia Apr 5 Jun 14 (Transplant out) -
Chamomile Apr 19 May 17 (Transplant out) Jun 29
Tarragon May 31 May 31 (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 Ola, Id, 4.3 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.

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