One of the first steps you take when you are estimating your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of making a decision about when to plant crossandra is to examine the USDA zone info for Stillwater.

Planting Calendar for Crossandra

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

You can not plant crossandra until after all chance of frost has passed because they require warm weather.

The earliest that you can plant crossandra in Stillwater is May. However, you really should wait until June 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 really do well. You can get started a few weeks earlier by starting your crossandra indoors.

Last Frost Date

The average date of last frost is May 15 in Stillwater. You can expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Stillwater is an average the actual date of last frost changes from year to year. Half of the time in Stillwater you get a frost after May 15 so always be ready to protect your crossandra if you have a late frost.

USDA Zone Info for Stillwater

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Stillwater

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