Growing Seasons by Hardiness Zone
Part of the Gardening All-in-One For Dummies Cheat Sheet
Where you live has a lot to do with what you can grow in your garden and how you can grow it. You can use the following chart to determine the length and time of your growing season according to the USDA hardiness zone you're in.
|Zone||Minimum Temperature (°F/°C)||Last Frost Date||First Frost Date||Typical # of Frost-Free Days|
|1||Below –50°F/Below –46°C||Jun 15||Jul 15||30|
|2||–50°F to –40°F/–46°C to –40°C||May 15||Aug 15||90|
|3||–40°F to –30°F/–40°C to –34°C||May 15||Sep 15||120|
|4||–30°F to –20°F/–34°C to –29°C||May 10||Sep 15||125|
|5||–20°F to –10°F/–29°C to –23°C||Apr 30||Oct 15||165|
|6||–10°F to 0°F/–23°C to –18°C||Apr 15||Oct 15||180|
|7||0°F to 10°F/–23°C to –12°C||Apr 15||Oct 15||180|
|8||10°F to 20°F/–12°C to –7°C||Mar 10||Nov 15||245|
|9||20°F to 30°F/–7°C to –1°C||Feb 15||Dec 15||265|
|10||30°F to 40°F/–1°C to 4°C||Jan 20||Dec 20||335|
|11||40°F and up/4°C and up||Frost-free||365|
Zone 1 is susceptible to frost all year.