One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of getting a good idea when it's possible to plant polygonums is to look at the USDA zone info for Jerseyville.

Planting Calendar for Polygonums

Frost tolerance for polygonums:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since polygonums are not cold tolerant you have to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant polygonums in Jerseyville is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant polygonums and expect a good harvest is probably August. You probably don't want to wait any later than that or else your polygonums may not have a chance to grow to maturity. Starting your polygonums indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Jerseyville. In the coldest months of winter you should expect an average low temperature of -10°F.

Keep in mind that USDA zone info for Jerseyville is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Jerseyville it frosts late in the year after April 15 so make sure that you are ready to protect your polygonums if you have a surprise late frost.

USDA Zone Info for Jerseyville

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 Jerseyville

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