Zip code 99030 is in USDA hardiness zone 6b, which means plants there can survive temperatures as low as -5 to 0°F each year.

99030 is in zone 6b. Hardiness zones and growing zones are the same thing, and the terms are used interchangeably.

Use zone 6b when selecting plants for 99030. Plants rated for other zones may not survive 99030's winter temperatures. Always check plant tags and labels for zone recommendations.

While you can try plants from other zones in 99030, they may need winter protection or indoor shelter during cold spells. Focus on plants recommended for Rockford's climate for the best results.

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

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

Recommended vegetables for 99030 include Beets, Broccoli, Brussels Sprouts, Cabbage, Carrots, Cucumbers, Eggplant, Green Beans, Kale, Onion, Peas, Radishes, Red Peppers, Romaine Lettuce, Spinach, Sweet Corn, Sweet Potatoes, Swiss Chard, Tomatoes and Zucchini.

The best fruits for 99030 include Apples, Apricots, Blackberries, Blueberries, Cherries, Currants, Elderberries, Figs, Gooseberries, Grapes, Hazelnuts, Mulberries, Pawpaw, Peaches, Pears, Persimmons, Plums, Quince, Raspberries and Strawberries.

For 99030 we recommend flowers like Aster, Azalea, Begonia, Black Eyed Susan, Coneflower, Daffodil, Dahlia, Daylily, Geranium, Hosta, Hydrangea, Iris, Lavender, Marigold, Peony, Phlox, Rose, Sunflower, Tulip and Zinnia.

Trees for 99030's temperatures include American Beech (Fagus grandifolia), American Sycamore (Platanus occidentalis), Black Cherry (Prunus serotina), Black Locust (Robinia pseudoacacia), Black Walnut (Juglans nigra), Blue Spruce (Picea pungens), Eastern Redbud (Cercis canadensis), Green Ash (Fraxinus pennsylvanica), Honey Locust (Gleditsia triacanthos), Japanese Maple (Acer palmatum), Northern Red Oak (Quercus rubra), Norway Spruce (Picea abies), Scarlet Oak (Quercus coccinea), Shagbark Hickory (Carya ovata), Sugar Maple (Acer saccharum), Sweet Birch (Betula lenta), Tulip Poplar (Liriodendron tulipifera), White Ash (Fraxinus americana), White Pine (Pinus strobus) and Yellow Buckeye (Aesculus flava).

We're still building our shrubs database for 99030. Our data is updated regularly with the latest USDA data, so check back often.