Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By using the USDA zone info for Lancaster it's possible to estimate when it's a good idea to plant cleome.

Planting Calendar for Cleome

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

Since cleome require warm weather you need to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant cleome in Lancaster 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. Any later than that and your cleome may not have a chance to really do well. 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

In Lancaster the average date of last frost happens on April 15. It might get as low as -5°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Lancaster is an average and the actual date of last frost will vary from year to year. Half of the time in Lancaster there is a last frost after April 15 so always be ready to cover your cleome in the event of one of those late frosts.

USDA Zone Info for Lancaster

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 Lancaster

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