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

The USDA zone info for Sullivan can be reviewed to figure out when you can plant cuphea.

Planting Calendar for Cuphea

Frost tolerance for cuphea:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since cuphea require warm weather it's necessary to wait until after the last frost has passed before you can plant them.

The earliest that you can plant cuphea in Sullivan 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 cuphea and expect a good harvest is probably August. Any later than that and your cuphea may not have a chance to really do well. You can get started a couple of weeks earlier by starting your cuphea indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Sullivan. You can expect an average low temperature of -10°F in the coldest months of winter.

Since the USDA zone info for Sullivan is just an average the actual date of last frost is different every year. Half of the time in Sullivan you get a frost after April 15 so make sure that you are prepared to protect your cuphea in the event of a late frost.

USDA Zone Info for Sullivan

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 Sullivan

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