Zip code 99621 is in USDA hardiness zone 4a, which means plants there can survive temperatures as low as -30 to -25°F each year.

99621 is in zone 4a. Hardiness zones and growing zones are the same thing, and the terms are used interchangeably.

Use zone 4a when selecting plants for 99621. Plants rated for other zones may not survive 99621's winter temperatures. Always check plant tags and labels for zone recommendations.

While you can try plants from other zones in 99621, they may need winter protection or indoor shelter during cold spells. Focus on plants recommended for Kwethluk's climate for the best results.

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

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

Recommended vegetables for 99621 include Beets, Broccoli, Brussels sprouts, Cabbage, Carrots, Cucumbers, Green beans, Kale, Lettuce, Onions, Parsnips, Peas, Potatoes, Radishes, Spinach, Sweet Corn, Swiss Chard, Tomatoes, Turnips and Zucchini.

The best fruits for 99621 include Apples, Apricots, Blackberries, Blueberries, Cherries, Currants, Elderberries, Gooseberries, Grapes, Hardy Kiwi, Highbush cranberries, Mulberries, Peaches, Pears, Plums, Quince, Raspberries, Rhubarb, Saskatoon berries and Strawberries.

For 99621 we recommend flowers like Astilbe (Astilbe), Black-Eyed Susan (Rudbeckia hirta), Bleeding Heart (Dicentra spectabilis), Clematis (Clematis), Coral Bells (Heuchera), Coreopsis (Coreopsis), Daylily (Hemerocallis), Delphinium (Delphinium), Hosta (Hosta spp.), Lavender (Lavandula angustifolia), Lily-of-the-Valley (Convallaria majalis), Lupine (Lupinus), Pansies (Viola x wittrockiana), Peony (Paeonia lactiflora), Phlox (Phlox paniculata), Purple Coneflower (Echinacea purpurea), Shasta Daisy (Chrysanthemum x superbum), Siberian Iris (Iris sibirica), Veronica (Veronica) and Yarrow (Achillea millefolium).

Trees for 99621's temperatures include American Basswood, American Elm, American Sycamore, Balsam Fir, Black Cherry, Black Walnut, Blue Spruce, Canadian Hemlock, Eastern Hemlock, Eastern White Pine, Hackberry, Hawthorn, Honey Locust, Northern Red Oak, Norway Spruce, River Birch, Sugar Maple, Tamarack, White Ash and White Spruce.

We're still building our shrubs database for 99621. Our data is updated regularly with the latest USDA data, so check back often.