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Using the Hardiness Zone Map

We want you to get the best results from what you select. That is why we have provided this Hardiness Zone Map. The Hardiness Zones are based on the average minimum temperatures for each zone. Many factors, such as sun, wind, snow cover or rainfall in your mini climate can also affect the minimum temperatures in your area as presented by this map.

USDA Plant Hardiness Zone Map

Find Your Hardiness Zone:

Enter your zip code in the box below.

Plant hardiness is very important to growing success. What exactly does it mean when a plant is hardy to your zone? What this is telling you is how much cold the plant can withstand without freezing to death. Zones are based on the average low temperatures that each area of the country has in winter. Meteorologists have arrived at this figure by averaging the temperatures over a 15-year period for each different region of the country. Check the map to determine which hardiness zone you live in or click on the "Find Zone" button to find your zone. You'll find zone designations on every product page on this site and in the print catalog. A variety marked "Zones 3-8," for example, should grow and thrive in zones 3, 4, 5, 6, 7 and 8.

If you really want a good look at your area, then the USDA Plant Hardiness Zone Map is also a good resource.

If you have a question, either call our Customer Service line, or consult your local County Agricultural Agent.

Ship Date/Hardiness Zone

Zone Lowest Avg. Winter Temperature Spring Catalog Shipping Begins Fall Catalog Shipping Begins
Zone 3 -30° to -20° F Early May Mid-September
Zone 4 -20° to -10° F Mid-Late April Mid-September
Zone 5 -10° to 0° F Mid-April Mid-September
Zone 6 0° to 10° F Late March - Early April Mid-September
Zone 7 10° to 20° F Mid - Late March Mid-September
Zone 8 20° to 30° F Early - Mid March Mid-September
Zone 9 30° to 40° F Mid-February Mid-September
Zone 10 40° to 50° F Mid-February Mid-September

Have another question? Send an e-mail directly to Customer Service or Call at 309-662-7761.

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