One of the best tools that you have as gardeners to help us estimate 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 making a decision about when to plant digitalis is to refer to the USDA zone info for Cary.

Planting Calendar for Digitalis

Frost tolerance for digitalis:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Digitalis are one of those plants that can tolerate a little bit of cold weather which tells us that you can start planting them earlier than more sensitive plants.

The earliest that you can plant digitalis in Cary is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant digitalis and expect a good harvest is probably September. You probably don't want to wait any later than that or else your digitalis may not have a chance to really do well. You can get started a couple of weeks earlier by starting your digitalis indoors.

Last Frost Date

The average date of last frost is April 15 in Cary. You should expect an average low temperature of 5°F in the coldest months of winter.

Since the USDA zone info for Cary is not always accurate the actual date of last frost changes from year to year. Half of the time in Cary you get surprised by a frost after April 15 so be sure to be ready to protect your digitalis if you have a surprise late frost.

USDA Zone Info for Cary

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 Cary

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