One of the first steps you take when you are figuring out 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.

The USDA zone info for Zone 1a should be looked at to determine when it's possible to plant crossandra.

Planting Calendar for Crossandra

Frost tolerance for crossandra:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since crossandra require warm weather you need to wait until after the last frost has passed before you can plant them.

The earliest that you can plant crossandra in Zone 1a is June. However, you really should wait until July if you don't want to take any chances.

The last month that you can plant crossandra and expect a good harvest is probably July. 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 June 15 in Zone 1a. It might get as low as -60°F during the coldest months of winter.

Keep in mind that the actual date of last frost is not always accurate because it is based on the USDA zone info for Zone 1a and it is different every year. Half of the time in Zone 1a you get a frost after June 15 so always be ready to protect your crossandra in the event of one of those late frosts.

USDA Zone Info for Zone 1a

Here is the info for USDA Zone 1a.

Average Date of Last Frost (spring)	June 15
Average Date of First Frost (fall)	July 15
Lowest Expected Low	-60°F
Highest Expected Low	-55°F

This means that on a really cold year, the coldest it will get is -60°F. On most years you should be prepared to experience lows near -55°F.

Plants to Grow in Zone 1a

You may be interested in your other planting guides for Zone 1a.