Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of estimating when it's a good idea to plant snow-in summer is to use the USDA zone info for Springfield.

Planting Calendar for Snow-in Summer

Frost tolerance for snow-in summer:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Snow-in Summer do ok in some cold which means that you can plant them just a bit earlier in the year than more sensitive plants.

The earliest that you can plant snow-in summer in Springfield is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant snow-in summer and expect a good harvest is probably September. You probably don't want to wait any later than that or else your snow-in summer may not have a chance to fully mature. Starting your snow-in summer indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Springfield. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Springfield is just an average the actual date of last frost changes from year to year. Since half of the time in Springfield you get surprised by a frost after April 15 be ready to cover your snow-in summer in the event of one of those late frosts.

USDA Zone Info for Springfield

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Springfield

You may be interested in your other planting guides for Springfield.