One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of getting a good idea when to plant polygonums is to look at the USDA zone info for Germantown.

Planting Calendar for Polygonums

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

Polygonums require warm weather which means that it is important to wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant polygonums in Germantown 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 really do well. If you are starting your polygonums indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost has passed is on April 15 in Germantown. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Germantown is not always accurate the actual date of last frost will vary from year to year. Half of the time in Germantown last frost occurs after April 15 so be sure to be ready to cover your polygonums in the event of a late frost.

USDA Zone Info for Germantown

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 Germantown

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