One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of estimating when to plant crassula is to examine the USDA zone info for Arnold.

Planting Calendar for Crassula

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

It's probably not a good idea to plant crassula until after the last frost because they require warm weather.

The earliest that you can plant crassula in Arnold 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. If you wait any later than that and your crassula may not have a chance to really do well. Starting your crassula indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Arnold. You can expect an average low temperature of -10°F in the coldest months of winter.

Since the USDA zone info for Arnold is not always accurate the actual date of last frost is different every year. Since half of the time in Arnold there is a last frost after April 15 be ready to cover your crassula in the event of one of those late frosts.

USDA Zone Info for Arnold

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 Arnold

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