Zip code 21704 is in USDA hardiness zone 7a, which means plants there can survive temperatures as low as 0 to 5°F each year.

21704 is in zone 7a. Hardiness zones and growing zones are the same thing, and the terms are used interchangeably.

Use zone 7a when selecting plants for 21704. Plants rated for other zones may not survive 21704's winter temperatures. Always check plant tags and labels for zone recommendations.

While you can try plants from other zones in 21704, they may need winter protection or indoor shelter during cold spells. Focus on plants recommended for Frederick's climate for the best results.

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

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

Recommended vegetables for 21704 include Beets, Bell Peppers, Broccoli, Cabbage, Carrots, Cucumbers, Eggplant, Garlic, Green Beans, Kale, Lettuce, Onions, Radishes, Spinach, Squash, Sweet Corn, Sweet Potatoes, Swiss Chard, Tomatoes and Zucchini.

The best fruits for 21704 include Apples, Apricots, Blackberries, Blueberries, Cherries, Currants, Elderberries, Figs, Grapes, Kiwifruit, Mulberries, Nectarines, Pawpaw, Peaches, Pears, Persimmons, Plums, Pomegranates, Raspberries and Strawberries.

For 21704 we recommend flowers like Azaleas, Butterfly Bush, Chrysanthemums, Coneflowers, Daffodils, Daylilies, Geraniums, Hostas, Hydrangeas, Iris, Lavender, Marigolds, Pansies, Petunias, Phlox, Roses, Salvia, Sunflowers, Tulips and Zinnia.

Trees for 21704's temperatures include American Beech, American Holly, Black Cherry, Black Walnut, Blue Spruce, Dogwood, Eastern Red Cedar, Green Ash, Honey Locust, Northern Red Oak, Pin Oak., Redbud, River Birch, Silver Maple, Sugar Maple, Sweetgum, White Ash, White Oak, White Pine and Yellow Poplar (Tulip Tree).

We're still building our shrubs database for 21704. Our data is updated regularly with the latest USDA data, so check back often.