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.

A common way of getting a good idea when it's a good idea to plant blue throatwort is to check out the USDA zone info for Greenville.

Planting Calendar for Blue Throatwort

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

You really shouldn't plant blue throatwort until after the last frost because they are not cold tolerant.

The earliest that you can plant blue throatwort in Greenville 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 blue throatwort and expect a good harvest is probably August. Any later than that and your blue throatwort may not have a chance to really do well. If you are starting your blue throatwort indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Greenville. You should expect an average low temperature of -15°F in the coldest months of winter.

It's important to remember that USDA zone info for Greenville is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Greenville there is a last frost after April 15 so always be ready to protect your blue throatwort if you have one of those late frosts.

USDA Zone Info for Greenville

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Greenville

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