Planting Calendar for ZIP 20620
Based on your local frost dates - last spring frost around Mar 22, first fall frost around Nov 26 - here is when to plant 79 common crops near ZIP 20620.
Last spring frost
Mar 22
First fall frost
Nov 26
Hardiness zone
8a
Vegetables
| Crop | Start seeds indoors | Plant outside | Fall planting by |
|---|---|---|---|
| Tomatoes | Feb 8 | Mar 29 (Transplant out) | - |
| Peppers | Jan 25 | Apr 5 (Transplant out) | - |
| Cucumbers | Mar 1 | Mar 29 (Transplant out) | Sep 18 |
| Zucchini | Mar 1 | Mar 29 (Transplant out) | Sep 23 |
| Summer Squash | Mar 1 | Mar 29 (Transplant out) | Sep 21 |
| Winter Squash | Mar 1 | Mar 29 (Transplant out) | - |
| Pumpkins | Mar 1 | Mar 29 (Transplant out) | - |
| Green Beans | - | Mar 22 (Direct sow) | Sep 18 |
| Sweet Corn | - | Mar 29 (Direct sow) | - |
| Melons | Mar 1 | Apr 5 (Transplant out) | - |
| Watermelon | Mar 1 | Apr 5 (Transplant out) | - |
| Okra | - | Apr 5 (Direct sow) | - |
| Eggplant | Jan 25 | Apr 5 (Transplant out) | - |
| Lettuce | Feb 22 | Feb 22 (Transplant out) | Sep 23 |
| Spinach | - | Feb 8 (Direct sow) | Sep 28 |
| Kale | Feb 8 | Mar 1 (Transplant out) | Sep 18 |
| Peas | - | Feb 8 (Direct sow) | Sep 13 |
| Carrots | - | Mar 1 (Direct sow) | Sep 3 |
| Beets | - | Feb 22 (Direct sow) | Sep 18 |
| Radishes | - | Feb 22 (Direct sow) | Oct 15 |
| Broccoli | Feb 8 | Mar 8 (Transplant out) | Sep 8 |
| Cauliflower | Feb 8 | Mar 8 (Transplant out) | Sep 3 |
| Cabbage | Feb 8 | Mar 1 (Transplant out) | Sep 3 |
| Onions | Jan 11 | Feb 22 (Transplant out) | - |
| Potatoes | - | Mar 8 (Direct sow) | - |
| Swiss Chard | Feb 22 | Mar 8 (Transplant out) | Sep 18 |
| Sweet Potatoes | - | Apr 12 (Direct sow) | - |
| Brussels Sprouts | Feb 8 | Mar 8 (Transplant out) | Aug 4 |
| Celery | Jan 11 | Mar 29 (Transplant out) | - |
| Leeks | Jan 11 | Mar 8 (Transplant out) | Jul 15 |
| Turnips | - | Mar 8 (Direct sow) | Sep 23 |
| Rutabaga | - | Mar 22 (Direct sow) | Aug 9 |
| Parsnips | - | Mar 8 (Direct sow) | Jul 15 |
| Kohlrabi | Feb 22 | Mar 8 (Transplant out) | Sep 18 |
| Collard Greens | Feb 8 | Mar 8 (Transplant out) | Sep 8 |
| Mustard Greens | - | Mar 8 (Direct sow) | Sep 28 |
| Arugula | - | Mar 8 (Direct sow) | Oct 3 |
| Bok Choy | Feb 22 | Mar 8 (Transplant out) | Sep 23 |
| Green Onions | - | Mar 8 (Direct sow) | Sep 13 |
| Tomatillos | Feb 8 | Mar 29 (Transplant out) | - |
| Fennel | Feb 22 | Mar 8 (Transplant out) | Aug 24 |
| Popcorn | Mar 22 | Apr 5 (Transplant out) | - |
| Black-Eyed Peas | Mar 22 | Apr 5 (Transplant out) | Aug 24 |
| Lima Beans | Mar 22 | Apr 5 (Transplant out) | - |
| Edamame | Mar 22 | Apr 5 (Transplant out) | - |
| Peanuts | Mar 22 | Apr 5 (Transplant out) | - |
| Globe Artichoke | Jan 25 | Mar 8 (Transplant out) | Aug 14 |
| Horseradish | Mar 22 | Mar 8 (Transplant out) | - |
| Ground Cherries | Feb 8 | Apr 5 (Transplant out) | - |
| Radicchio | Feb 15 | Mar 8 (Transplant out) | Sep 3 |
| Endive | Feb 15 | Mar 8 (Transplant out) | Aug 14 |
| Watercress | Mar 1 | Mar 8 (Transplant out) | Sep 13 |
| Sorrel | Feb 8 | Mar 1 (Transplant out) | Sep 13 |
| Sunchokes | Mar 22 | Mar 8 (Transplant out) | - |
| Malabar Spinach | Feb 8 | Apr 5 (Transplant out) | - |
| Amaranth Greens | Mar 1 | Apr 5 (Transplant out) | Sep 28 |
| Luffa Gourd | Feb 8 | Apr 5 (Transplant out) | - |
| New Zealand Spinach | Feb 22 | Apr 5 (Transplant out) | - |
| Fava Beans | Mar 22 | Feb 22 (Transplant out) | Aug 19 |
| Chayote | Feb 22 | Apr 5 (Transplant out) | - |
| Corn Salad | Mar 22 | Feb 22 (Transplant out) | Sep 13 |
| Bitter Melon | Feb 22 | Apr 5 (Transplant out) | - |
| Cardoon | Feb 8 | Mar 22 (Transplant out) | - |
Herbs
| Crop | Start seeds indoors | Plant outside | Fall planting by |
|---|---|---|---|
| Basil | Feb 8 | Mar 29 (Transplant out) | - |
| Cilantro | - | Mar 8 (Direct sow) | Sep 23 |
| Parsley | Jan 25 | Apr 5 (Transplant out) | Aug 29 |
| Dill | - | Mar 29 (Direct sow) | Sep 13 |
| Lemon Balm | Feb 8 | Mar 22 (Transplant out) | - |
| Borage | Mar 22 | Mar 22 (Transplant out) | Sep 18 |
| Chervil | Mar 22 | Mar 1 (Transplant out) | Sep 18 |
| Lemongrass | Jan 25 | Apr 5 (Transplant out) | - |
| Summer Savory | Feb 8 | Mar 22 (Transplant out) | - |
| Marjoram | Feb 8 | Mar 29 (Transplant out) | - |
| Lovage | Feb 8 | Mar 22 (Transplant out) | Aug 14 |
| Anise Hyssop | Jan 25 | Mar 22 (Transplant out) | - |
| Shiso | Feb 8 | Mar 29 (Transplant out) | - |
| Stevia | Jan 25 | Apr 5 (Transplant out) | - |
| Chamomile | Feb 8 | Mar 8 (Transplant out) | Sep 8 |
| Tarragon | Mar 22 | Mar 22 (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 Solomons, Md, 7.1 miles away. Averages for planning, not a forecast. Page updated Aug 4, 2026.