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.

One way of getting a good idea when it's a good idea to plant crossandra is to consult the USDA zone info for Knoxville.

Planting Calendar for Crossandra

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

It's not a good idea to plant crossandra until after the last frost because they require warm weather.

The earliest that you can plant crossandra in Knoxville 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 crossandra and expect a good harvest is probably August. If you wait any later than that and your crossandra may not have a chance to really do well. Starting your crossandra indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost has passed is on April 15 in Knoxville. In the coldest months of winter you should expect an average low temperature of -15°F.

Keep in mind that USDA zone info for Knoxville 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 Knoxville you get a frost after April 15 so make sure that you are ready to cover your crossandra if you have one of those late frosts.

USDA Zone Info for Knoxville

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Knoxville

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