The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's possible to figure out when you can plant polygonums by looking at the USDA zone info for Kansas City.

Planting Calendar for Polygonums

Frost tolerance for polygonums:	Not tolerant of frost.
When to plant:	After the last frost.

You should not plant polygonums until after the last frost because they are not cold tolerant.

The earliest that you can plant polygonums in Kansas City 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. Any later than that and your polygonums may not have a chance to really do well. You can get started a couple of weeks earlier by starting your polygonums indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Kansas City. It might get as low as -5°F during the coldest months of winter.

Always keep in mind that USDA zone info for Kansas City is an average and the actual date of last frost will vary from year to year. Half of the time in Kansas City last frost occurs after April 15 so make sure that you are ready to cover your polygonums in the event of one of those late frosts.

USDA Zone Info for Kansas City

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Kansas City

You may be interested in your other planting guides for Kansas City.