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.

The first chance to plant purple rock cress in Rockwood can be determined by looking at the USDA zone info.

Planting Calendar for Purple Rock Cress

Frost tolerance for purple rock cress:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Purple Rock Cress can survive in pretty solid cold which means that you can plant them much earlier in the year than other frost tender plants.

The earliest that you can plant purple rock cress in Rockwood 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 purple rock cress and expect a good harvest is probably September. If you wait any later than that and your purple rock cress may not have a chance to fully mature. Starting your purple rock cress indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Rockwood. In the coldest months of winter you should expect an average low temperature of 0°F.

Since the USDA zone info for Rockwood is not always accurate the actual date of last frost is different every year. Half of the time in Rockwood there is a last frost after April 15 so be sure to be ready to protect your purple rock cress if you have a late frost.

USDA Zone Info for Rockwood

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Rockwood

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