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.

One way of making a decision about when it's possible to plant polygonums is to refer to the USDA zone info for Southlake.

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 must wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant polygonums in Southlake 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 grow to maturity. Starting your polygonums indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on March 15 in Southlake. In the coldest months of winter you should expect an average low temperature of 10°F.

Since the USDA zone info for Southlake may not be accurate from year to year the actual date of last frost changes from year to year. Since half of the time in Southlake you get a frost after March 15 be ready to protect your polygonums in the event of a surprise late frost.

USDA Zone Info for Southlake

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°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 15°F.

Plants to Grow in Southlake

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