Zip code 20851 is in USDA hardiness zone 7b, which means plants there can survive temperatures as low as 5 to 10°F each year.

20851 is in zone 7b. Hardiness zones and growing zones are the same thing, and the terms are used interchangeably.

Use zone 7b when selecting plants for 20851. Plants rated for other zones may not survive 20851's winter temperatures. Always check plant tags and labels for zone recommendations.

While you can try plants from other zones in 20851, they may need winter protection or indoor shelter during cold spells. Focus on plants recommended for Rockville's climate for the best results.

For detailed growing zone information, visit our page on the growing zone for Rockville.

Absolutely. We offer plant recommendations for every town in the United States. We have a page on the best plants for Rockville that you might be interested in.

Recommended vegetables for 20851 include Beets, Broccoli, Brussels Sprouts, Cabbage, Carrots, Collard Greens, Cucumbers, Eggplant, Green Beans, Kale, Lettuce, Peas, Radishes, Spinach, Squash, Sweet Bell Peppers, Swiss Chard, Tomatoes, Turnips and Zucchini.

The best fruits for 20851 include Apples, Apricots, Blackberries, Blueberries, Cherries, Currants, Elderberries, Figs, Grapes, Kiwi, Mulberries, Peaches, Pears, Persimmons, Plums, Pomegranates, Quince, Raspberries, Strawberries and Walnuts.

For 20851 we recommend flowers like Azaleas, Begonias, Chrysanthemums, Coneflowers, Crocuses, Daffodils, Dahlia, Daylilies, Geraniums, Hyacinths, Hydrangeas, Irises, Lavender, Lilies, Marigold, Pansies, Periwinkle, Petunias, Roses and Tulips.

Trees for 20851's temperatures include American Holly (Ilex opaca), American White Elm (Ulmus americana), Bald Cypress (Taxodium distichum), Black Willow (Salix nigra), Carolina Silverbell (Halesia carolina), Dogwood (Cornus florida), Eastern Redbud (Cercis canadensis), Eastern White Pine (Pinus strobus), Loblolly Pine (Pinus taeda), Northern Red Oak (Quercus rubra), Red Maple (Acer rubrum), River Birch (Betula nigra), Southern Magnolia (Magnolia grandiflora), Sugar Maple (Acer saccharum), Sweetgum (Liquidambar styraciflua), Sycamore (Platanus occidentalis), Tulip Poplar (Liriodendron tulipifera), Virginia Pine (Pinus virginiana), White Ash (Fraxinus americana) and White Oak (Quercus alba).

We're still building our shrubs database for 20851. Our data is updated regularly with the latest USDA data, so check back often.