One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of estimating when it's possible to plant cleome is to refer to the USDA zone info for Hartwell.

Planting Calendar for Cleome

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

Cleome require warm weather which means that you really should wait until it warms up after the last frost when the weather gets warmer before you can plant them.

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

Last Frost Date

The average date of last frost is March 15 in Hartwell. It might get as low as 10°F during the coldest months of winter.

It's important to remember that USDA zone info for Hartwell may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Hartwell there is a last frost after March 15 so make sure that you are prepared to cover your cleome in the event of one of those late frosts.

USDA Zone Info for Hartwell

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 Hartwell

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