When can I plant Crassula in Zone 4b

The USDA Zone info is a great tool for gardeners to help us estimate our gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

The first chance to plant crassula in Zone 4b should be estimated by using the USDA zone info.


Planting Calendar for Crassula

Frost tolerance for crassula: Not tolerant of frost.
When you should plant them: After the last frost when the weather gets warmer.

Crassula are not cold tolerant which means that you have to wait until it warms up after the last frost before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant crassula
Possibly ok, but a risky time to plant crassula
Probably not a good time to plant crassula

The earliest that you can plant crassula in Zone 4b 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 crassula and expect a good harvest is probably August. Any later than that and your crassula may not have a chance to fully mature. You can get started a little bit earlier by starting your crassula indoors.

Last Frost Date

In Zone 4b the average date of last frost happens on May 15. In the coldest months of winter we should expect an average low temperature of -25°F.

It's important to remember that USDA zone info for Zone 4b may not be accurate from year to year and our actual date of last frost will vary from year to year. Half of the time in Zone 4b there is a last frost after May 15 so make sure that you are ready to cover your crassula if we have one of those late frosts.

USDA Zone Info for Zone 4b

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 Zone 4b

You may be interested in our other planting guides for Zone 4b.