One of the best tools that you have as gardeners to help us figure out 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.

By reviewing the USDA zone info for Oak Grove it's a good idea to figure out when 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 do ok in pretty solid cold which tells us that you can plant them a lot earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant liatris in Oak Grove 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. If you wait any later than that and your liatris may not have a chance to grow to maturity. You can get started a little bit earlier by starting your liatris indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Oak Grove. In the coldest months of winter you should expect an average low temperature of -10°F.

It's important to remember that USDA zone info for Oak Grove may not be accurate from year to year and the actual date of last frost is different every year. Since half of the time in Oak Grove you get surprised by a frost after April 15 be ready to protect your liatris if you have one of those late frosts.

USDA Zone Info for Oak Grove

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 Oak Grove

You may be interested in your other planting guides for Oak Grove.