Harman US

Planting Calendar for ZIP 68040

Based on your local frost dates - last spring frost around Apr 23, first fall frost around Oct 13 - here is when to plant 79 common crops near ZIP 68040.

Last spring frost
Apr 23
First fall frost
Oct 13
Hardiness zone
5b

Vegetables

Crop Start seeds indoors Plant outside Fall planting by
Tomatoes Mar 12 Apr 30 (Transplant out) -
Peppers Feb 26 May 7 (Transplant out) -
Cucumbers Apr 2 Apr 30 (Transplant out) Aug 5
Zucchini Apr 2 Apr 30 (Transplant out) Aug 10
Summer Squash Apr 2 Apr 30 (Transplant out) Aug 8
Winter Squash Apr 2 Apr 30 (Transplant out) -
Pumpkins Apr 2 Apr 30 (Transplant out) -
Green Beans - Apr 23 (Direct sow) Aug 5
Sweet Corn - Apr 30 (Direct sow) -
Melons Apr 2 May 7 (Transplant out) -
Watermelon Apr 2 May 7 (Transplant out) -
Okra - May 7 (Direct sow) -
Eggplant Feb 26 May 7 (Transplant out) -
Lettuce Mar 26 Mar 26 (Transplant out) Aug 10
Spinach - Mar 12 (Direct sow) Aug 15
Kale Mar 12 Apr 2 (Transplant out) Aug 5
Peas - Mar 12 (Direct sow) Jul 31
Carrots - Apr 2 (Direct sow) Jul 21
Beets - Mar 26 (Direct sow) Aug 5
Radishes - Mar 26 (Direct sow) Sep 1
Broccoli Mar 12 Apr 9 (Transplant out) Jul 26
Cauliflower Mar 12 Apr 9 (Transplant out) Jul 21
Cabbage Mar 12 Apr 2 (Transplant out) Jul 21
Onions Feb 12 Mar 26 (Transplant out) -
Potatoes - Apr 9 (Direct sow) -
Swiss Chard Mar 26 Apr 9 (Transplant out) Aug 5
Sweet Potatoes - May 14 (Direct sow) -
Brussels Sprouts Mar 12 Apr 9 (Transplant out) Jun 21
Celery Feb 12 Apr 30 (Transplant out) -
Leeks Feb 12 Apr 9 (Transplant out) Jun 1
Turnips - Apr 9 (Direct sow) Aug 10
Rutabaga - Apr 23 (Direct sow) Jun 26
Parsnips - Apr 9 (Direct sow) Jun 1
Kohlrabi Mar 26 Apr 9 (Transplant out) Aug 5
Collard Greens Mar 12 Apr 9 (Transplant out) Jul 26
Mustard Greens - Apr 9 (Direct sow) Aug 15
Arugula - Apr 9 (Direct sow) Aug 20
Bok Choy Mar 26 Apr 9 (Transplant out) Aug 10
Green Onions - Apr 9 (Direct sow) Jul 31
Tomatillos Mar 12 Apr 30 (Transplant out) -
Fennel Mar 26 Apr 9 (Transplant out) Jul 11
Popcorn Apr 23 May 7 (Transplant out) -
Black-Eyed Peas Apr 23 May 7 (Transplant out) Jul 11
Lima Beans Apr 23 May 7 (Transplant out) -
Edamame Apr 23 May 7 (Transplant out) -
Peanuts Apr 23 May 7 (Transplant out) -
Globe Artichoke Feb 26 Apr 9 (Transplant out) Jul 1
Horseradish Apr 23 Apr 9 (Transplant out) -
Ground Cherries Mar 12 May 7 (Transplant out) -
Radicchio Mar 19 Apr 9 (Transplant out) Jul 21
Endive Mar 19 Apr 9 (Transplant out) Jul 1
Watercress Apr 2 Apr 9 (Transplant out) Jul 31
Sorrel Mar 12 Apr 2 (Transplant out) Jul 31
Sunchokes Apr 23 Apr 9 (Transplant out) -
Malabar Spinach Mar 12 May 7 (Transplant out) -
Amaranth Greens Apr 2 May 7 (Transplant out) Aug 15
Luffa Gourd Mar 12 May 7 (Transplant out) -
New Zealand Spinach Mar 26 May 7 (Transplant out) -
Fava Beans Apr 23 Mar 26 (Transplant out) Jul 6
Chayote Mar 26 May 7 (Transplant out) -
Corn Salad Apr 23 Mar 26 (Transplant out) Jul 31
Bitter Melon Mar 26 May 7 (Transplant out) -
Cardoon Mar 12 Apr 23 (Transplant out) -

Herbs

Crop Start seeds indoors Plant outside Fall planting by
Basil Mar 12 Apr 30 (Transplant out) -
Cilantro - Apr 9 (Direct sow) Aug 10
Parsley Feb 26 May 7 (Transplant out) Jul 16
Dill - Apr 30 (Direct sow) Jul 31
Lemon Balm Mar 12 Apr 23 (Transplant out) -
Borage Apr 23 Apr 23 (Transplant out) Aug 5
Chervil Apr 23 Apr 2 (Transplant out) Aug 5
Lemongrass Feb 26 May 7 (Transplant out) -
Summer Savory Mar 12 Apr 23 (Transplant out) -
Marjoram Mar 12 Apr 30 (Transplant out) -
Lovage Mar 12 Apr 23 (Transplant out) Jul 1
Anise Hyssop Feb 26 Apr 23 (Transplant out) -
Shiso Mar 12 Apr 30 (Transplant out) -
Stevia Feb 26 May 7 (Transplant out) -
Chamomile Mar 12 Apr 9 (Transplant out) Jul 26
Tarragon Apr 23 Apr 23 (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 Weston 3Nw, Ne, 5 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.

Full frost dates for 68040 Local weather →