The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You can estimate when it's possible to plant crassula in Petersburg by referring to the USDA zone info.

Planting Calendar for Crassula

Frost tolerance for crassula:	Not tolerant of frost.
When to plant:	After the last frost.

Since crassula are not cold tolerant you must wait until after the last frost has passed before you can plant them.

The earliest that you can plant crassula in Petersburg 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 crassula and expect a good harvest is probably August. You probably don't want to wait any later than that or else your crassula may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your crassula indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Petersburg. In the coldest months of winter you can expect an average low temperature of 5°F.

Remember that USDA zone info for Petersburg is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Petersburg it frosts late in the year after April 15 so be sure to be ready to cover your crassula if you have a surprise late frost.

USDA Zone Info for Petersburg

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Petersburg

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