Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By referring to the USDA zone info for Pittsburg it's a good idea to estimate when it's the best time to plant liatris.

Planting Calendar for Liatris

Frost tolerance for liatris:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Liatris tend to make it in cold weather which means that you can plant them a lot earlier in the year than more sensitive plants.

The earliest that you can plant liatris in Pittsburg 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 liatris and expect a good harvest is probably September. You probably don't want to wait any later than that or else your liatris may not have a chance to grow to maturity. If you are starting your liatris indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Pittsburg. In the coldest months of winter you should expect an average low temperature of -5°F.

It's important to remember that USDA zone info for Pittsburg is just an average and the actual date of last frost changes from year to year. Since half of the time in Pittsburg you get surprised by a frost after April 15 be ready to protect your liatris in the event of one of those late frosts.

USDA Zone Info for Pittsburg

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 Pittsburg

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