Zip code 51446 is in USDA hardiness zone 5a, which means plants there can survive temperatures as low as -20 to -15°F each year.

51446 is in zone 5a. Hardiness zones and growing zones are the same thing, and the terms are used interchangeably.

Use zone 5a when selecting plants for 51446. Plants rated for other zones may not survive 51446's winter temperatures. Always check plant tags and labels for zone recommendations.

While you can try plants from other zones in 51446, they may need winter protection or indoor shelter during cold spells. Focus on plants recommended for Irwin's climate for the best results.

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

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

Recommended vegetables for 51446 include Beets, Broccoli, Brussels sprouts, Cabbage, Carrots, Cauliflower, Cucumbers, Green beans, Kale, Lettuce, Onions, Peas, Peppers, Potatoes, Radishes, Spinach, Squash, Swiss chard, Tomatoes and Zucchini..

The best fruits for 51446 include Apples, Apricots, Blackberries, Blueberries, Cherries, Concord Grapes, Currants, Elderberries, Gooseberries, Grapes, Hardy Kiwi, Mulberries, Peaches, Pears, Plums, Quince, Raspberries, Rhubarb, Saskatoon Berry and Strawberries.

For 51446 we recommend flowers like Aster, Azaleas, Bee Balm, Black-Eyed Susans, Columbines, Coneflowers, Daffodils, Daylilies, Garden Phlox, Hostas, Hydrangeas, Irises, Marigolds, Peonies, Primrose, Rhododendrons, Rudbeckia, Russian Sage, Sunflowers and Tulips.

Trees for 51446's temperatures include American Beech (Fagus grandifolia), American Elm (Ulmus americana), Black Cherry (Prunus serotina)., Black Walnut (Juglans nigra), Colorado Blue Spruce (Picea pungens), Douglas Fir (Pseudotsuga menziesii), Eastern Hemlock (Tsuga canadensis), Eastern Red Cedar (Juniperus virginiana), Littleleaf Linden (Tilia cordata), Northern Red Oak (Quercus rubra), Red Maple (Acer rubrum), River Birch (Betula nigra), Sugar Maple (Acer saccharum), Sweet Birch (Betula lenta), White Ash (Fraxinus americana), White Birch (Betula papyrifera), White fir (Abies concolor), White Oak (Quercus alba), White Pine (Pinus strobus) and Yellow Birch (Betula alleghaniensis).

We're still building our shrubs database for 51446. Our data is updated regularly with the latest USDA data, so check back often.