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

In Mount Vernon you can estimate when it's a good idea to plant crossandra by using the USDA zone info.

Planting Calendar for Crossandra

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

You really shouldn't plant crossandra until after the last frost because they require warm weather.

The earliest that you can plant crossandra in Mount Vernon 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. You probably don't want to wait any later than that or else your crossandra may not have a chance to fully mature. You can get started a little bit earlier by starting your crossandra indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Mount Vernon. You can expect an average low temperature of -10°F in the coldest months of winter.

Since the USDA zone info for Mount Vernon is not always accurate the actual date of last frost can change quite a bit from year to year. Since half of the time in Mount Vernon there is a last frost after April 15 be ready to cover your crossandra if you have a surprise late frost.

USDA Zone Info for Mount Vernon

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 Mount Vernon

You may be interested in your other planting guides for Mount Vernon.