One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of getting a good idea when to plant crossandra is to look at the USDA zone info for Oak Ridge.

Planting Calendar for Crossandra

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

Since crossandra require warm weather it is important to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant crossandra in Oak Ridge 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 fully mature. Starting your crossandra indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Oak Ridge the average date of last frost happens on April 15. In the coldest months of winter you should expect an average low temperature of 0°F.

Since the USDA zone info for Oak Ridge is not always accurate the actual date of last frost changes from year to year. Half of the time in Oak Ridge there is a last frost after April 15 so make sure that you are prepared to protect your crossandra in the event of a surprise late frost.

USDA Zone Info for Oak Ridge

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Oak Ridge

You may be interested in your other planting guides for Oak Ridge.