Harman US

Planting Calendar for ZIP 21863

Based on your local frost dates - last spring frost around Apr 10, first fall frost around Oct 31 - here is when to plant 79 common crops near ZIP 21863.

Last spring frost
Apr 10
First fall frost
Oct 31
Hardiness zone
7b

Vegetables

Crop Start seeds indoors Plant outside Fall planting by
Tomatoes Feb 27 Apr 17 (Transplant out) -
Peppers Feb 13 Apr 24 (Transplant out) -
Cucumbers Mar 20 Apr 17 (Transplant out) Aug 23
Zucchini Mar 20 Apr 17 (Transplant out) Aug 28
Summer Squash Mar 20 Apr 17 (Transplant out) Aug 26
Winter Squash Mar 20 Apr 17 (Transplant out) -
Pumpkins Mar 20 Apr 17 (Transplant out) -
Green Beans - Apr 10 (Direct sow) Aug 23
Sweet Corn - Apr 17 (Direct sow) -
Melons Mar 20 Apr 24 (Transplant out) -
Watermelon Mar 20 Apr 24 (Transplant out) -
Okra - Apr 24 (Direct sow) -
Eggplant Feb 13 Apr 24 (Transplant out) -
Lettuce Mar 13 Mar 13 (Transplant out) Aug 28
Spinach - Feb 27 (Direct sow) Sep 2
Kale Feb 27 Mar 20 (Transplant out) Aug 23
Peas - Feb 27 (Direct sow) Aug 18
Carrots - Mar 20 (Direct sow) Aug 8
Beets - Mar 13 (Direct sow) Aug 23
Radishes - Mar 13 (Direct sow) Sep 19
Broccoli Feb 27 Mar 27 (Transplant out) Aug 13
Cauliflower Feb 27 Mar 27 (Transplant out) Aug 8
Cabbage Feb 27 Mar 20 (Transplant out) Aug 8
Onions Jan 30 Mar 13 (Transplant out) -
Potatoes - Mar 27 (Direct sow) -
Swiss Chard Mar 13 Mar 27 (Transplant out) Aug 23
Sweet Potatoes - May 1 (Direct sow) -
Brussels Sprouts Feb 27 Mar 27 (Transplant out) Jul 9
Celery Jan 30 Apr 17 (Transplant out) -
Leeks Jan 30 Mar 27 (Transplant out) Jun 19
Turnips - Mar 27 (Direct sow) Aug 28
Rutabaga - Apr 10 (Direct sow) Jul 14
Parsnips - Mar 27 (Direct sow) Jun 19
Kohlrabi Mar 13 Mar 27 (Transplant out) Aug 23
Collard Greens Feb 27 Mar 27 (Transplant out) Aug 13
Mustard Greens - Mar 27 (Direct sow) Sep 2
Arugula - Mar 27 (Direct sow) Sep 7
Bok Choy Mar 13 Mar 27 (Transplant out) Aug 28
Green Onions - Mar 27 (Direct sow) Aug 18
Tomatillos Feb 27 Apr 17 (Transplant out) -
Fennel Mar 13 Mar 27 (Transplant out) Jul 29
Popcorn Apr 10 Apr 24 (Transplant out) -
Black-Eyed Peas Apr 10 Apr 24 (Transplant out) Jul 29
Lima Beans Apr 10 Apr 24 (Transplant out) -
Edamame Apr 10 Apr 24 (Transplant out) -
Peanuts Apr 10 Apr 24 (Transplant out) -
Globe Artichoke Feb 13 Mar 27 (Transplant out) Jul 19
Horseradish Apr 10 Mar 27 (Transplant out) -
Ground Cherries Feb 27 Apr 24 (Transplant out) -
Radicchio Mar 6 Mar 27 (Transplant out) Aug 8
Endive Mar 6 Mar 27 (Transplant out) Jul 19
Watercress Mar 20 Mar 27 (Transplant out) Aug 18
Sorrel Feb 27 Mar 20 (Transplant out) Aug 18
Sunchokes Apr 10 Mar 27 (Transplant out) -
Malabar Spinach Feb 27 Apr 24 (Transplant out) -
Amaranth Greens Mar 20 Apr 24 (Transplant out) Sep 2
Luffa Gourd Feb 27 Apr 24 (Transplant out) -
New Zealand Spinach Mar 13 Apr 24 (Transplant out) -
Fava Beans Apr 10 Mar 13 (Transplant out) Jul 24
Chayote Mar 13 Apr 24 (Transplant out) -
Corn Salad Apr 10 Mar 13 (Transplant out) Aug 18
Bitter Melon Mar 13 Apr 24 (Transplant out) -
Cardoon Feb 27 Apr 10 (Transplant out) -

Herbs

Crop Start seeds indoors Plant outside Fall planting by
Basil Feb 27 Apr 17 (Transplant out) -
Cilantro - Mar 27 (Direct sow) Aug 28
Parsley Feb 13 Apr 24 (Transplant out) Aug 3
Dill - Apr 17 (Direct sow) Aug 18
Lemon Balm Feb 27 Apr 10 (Transplant out) -
Borage Apr 10 Apr 10 (Transplant out) Aug 23
Chervil Apr 10 Mar 20 (Transplant out) Aug 23
Lemongrass Feb 13 Apr 24 (Transplant out) -
Summer Savory Feb 27 Apr 10 (Transplant out) -
Marjoram Feb 27 Apr 17 (Transplant out) -
Lovage Feb 27 Apr 10 (Transplant out) Jul 19
Anise Hyssop Feb 13 Apr 10 (Transplant out) -
Shiso Feb 27 Apr 17 (Transplant out) -
Stevia Feb 13 Apr 24 (Transplant out) -
Chamomile Feb 27 Mar 27 (Transplant out) Aug 13
Tarragon Apr 10 Apr 10 (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 Snow Hill 4 N, Md, 3.3 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.

Full frost dates for 21863 Local weather →