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 way of getting a good idea when it's the best time to plant cuphea is to use the USDA zone info for Colville.

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 do not do well in cold weather it is important to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant cuphea in Colville 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 Colville. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Colville is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Colville you get a frost after April 15 so make sure that you are ready to protect your cuphea in the event of one of those late frosts.

USDA Zone Info for Colville

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 Colville

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