Harman US

Planting Calendar for ZIP 68942

Based on your local frost dates - last spring frost around May 1, first fall frost around Oct 5 - here is when to plant 79 common crops near ZIP 68942.

Last spring frost
May 1
First fall frost
Oct 5
Hardiness zone
6a

Vegetables

Crop Start seeds indoors Plant outside Fall planting by
Tomatoes Mar 20 May 8 (Transplant out) -
Peppers Mar 6 May 15 (Transplant out) -
Cucumbers Apr 10 May 8 (Transplant out) Jul 28
Zucchini Apr 10 May 8 (Transplant out) Aug 2
Summer Squash Apr 10 May 8 (Transplant out) Jul 31
Winter Squash Apr 10 May 8 (Transplant out) -
Pumpkins Apr 10 May 8 (Transplant out) -
Green Beans - May 1 (Direct sow) Jul 28
Sweet Corn - May 8 (Direct sow) -
Melons Apr 10 May 15 (Transplant out) -
Watermelon Apr 10 May 15 (Transplant out) -
Okra - May 15 (Direct sow) -
Eggplant Mar 6 May 15 (Transplant out) -
Lettuce Apr 3 Apr 3 (Transplant out) Aug 2
Spinach - Mar 20 (Direct sow) Aug 7
Kale Mar 20 Apr 10 (Transplant out) Jul 28
Peas - Mar 20 (Direct sow) Jul 23
Carrots - Apr 10 (Direct sow) Jul 13
Beets - Apr 3 (Direct sow) Jul 28
Radishes - Apr 3 (Direct sow) Aug 24
Broccoli Mar 20 Apr 17 (Transplant out) Jul 18
Cauliflower Mar 20 Apr 17 (Transplant out) Jul 13
Cabbage Mar 20 Apr 10 (Transplant out) Jul 13
Onions Feb 20 Apr 3 (Transplant out) -
Potatoes - Apr 17 (Direct sow) -
Swiss Chard Apr 3 Apr 17 (Transplant out) Jul 28
Sweet Potatoes - May 22 (Direct sow) -
Brussels Sprouts Mar 20 Apr 17 (Transplant out) Jun 13
Celery Feb 20 May 8 (Transplant out) -
Leeks Feb 20 Apr 17 (Transplant out) May 24
Turnips - Apr 17 (Direct sow) Aug 2
Rutabaga - May 1 (Direct sow) Jun 18
Parsnips - Apr 17 (Direct sow) May 24
Kohlrabi Apr 3 Apr 17 (Transplant out) Jul 28
Collard Greens Mar 20 Apr 17 (Transplant out) Jul 18
Mustard Greens - Apr 17 (Direct sow) Aug 7
Arugula - Apr 17 (Direct sow) Aug 12
Bok Choy Apr 3 Apr 17 (Transplant out) Aug 2
Green Onions - Apr 17 (Direct sow) Jul 23
Tomatillos Mar 20 May 8 (Transplant out) -
Fennel Apr 3 Apr 17 (Transplant out) Jul 3
Popcorn May 1 May 15 (Transplant out) -
Black-Eyed Peas May 1 May 15 (Transplant out) Jul 3
Lima Beans May 1 May 15 (Transplant out) -
Edamame May 1 May 15 (Transplant out) -
Peanuts May 1 May 15 (Transplant out) -
Globe Artichoke Mar 6 Apr 17 (Transplant out) Jun 23
Horseradish May 1 Apr 17 (Transplant out) -
Ground Cherries Mar 20 May 15 (Transplant out) -
Radicchio Mar 27 Apr 17 (Transplant out) Jul 13
Endive Mar 27 Apr 17 (Transplant out) Jun 23
Watercress Apr 10 Apr 17 (Transplant out) Jul 23
Sorrel Mar 20 Apr 10 (Transplant out) Jul 23
Sunchokes May 1 Apr 17 (Transplant out) -
Malabar Spinach Mar 20 May 15 (Transplant out) -
Amaranth Greens Apr 10 May 15 (Transplant out) Aug 7
Luffa Gourd Mar 20 May 15 (Transplant out) -
New Zealand Spinach Apr 3 May 15 (Transplant out) -
Fava Beans May 1 Apr 3 (Transplant out) Jun 28
Chayote Apr 3 May 15 (Transplant out) -
Corn Salad May 1 Apr 3 (Transplant out) Jul 23
Bitter Melon Apr 3 May 15 (Transplant out) -
Cardoon Mar 20 May 1 (Transplant out) -

Herbs

Crop Start seeds indoors Plant outside Fall planting by
Basil Mar 20 May 8 (Transplant out) -
Cilantro - Apr 17 (Direct sow) Aug 2
Parsley Mar 6 May 15 (Transplant out) Jul 8
Dill - May 8 (Direct sow) Jul 23
Lemon Balm Mar 20 May 1 (Transplant out) -
Borage May 1 May 1 (Transplant out) Jul 28
Chervil May 1 Apr 10 (Transplant out) Jul 28
Lemongrass Mar 6 May 15 (Transplant out) -
Summer Savory Mar 20 May 1 (Transplant out) -
Marjoram Mar 20 May 8 (Transplant out) -
Lovage Mar 20 May 1 (Transplant out) Jun 23
Anise Hyssop Mar 6 May 1 (Transplant out) -
Shiso Mar 20 May 8 (Transplant out) -
Stevia Mar 6 May 15 (Transplant out) -
Chamomile Mar 20 Apr 17 (Transplant out) Jul 18
Tarragon May 1 May 1 (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 Red Cloud, Ne, 10.5 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.

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