Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. 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 Crossville should be read to figure out when you can plant cardinal flower.

Planting Calendar for Cardinal Flower

Frost tolerance for cardinal flower:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since cardinal flower are not cold tolerant you need to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant cardinal flower in Crossville 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 cardinal flower and expect a good harvest is probably August. You probably don't want to wait any later than that or else your cardinal flower may not have a chance to fully mature. You can get started a few weeks earlier by starting your cardinal flower indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Crossville. It might get as low as -5°F during the coldest months of winter.

Since the USDA zone info for Crossville is an average the actual date of last frost will vary from year to year. Half of the time in Crossville last frost occurs after April 15 so make sure that you are ready to protect your cardinal flower in the event of a surprise late frost.

USDA Zone Info for Crossville

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 Crossville

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