One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Lilburn can be looked at to determine when it's possible to plant purple rock cress.

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.

You can plant purple rock cress quite a bit earlier in the year because they are very cold tolerant.

The earliest that you can plant purple rock cress in Lilburn 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. You probably don't want to wait any later than that or else your purple rock cress may not have a chance to grow to maturity. You can get started a little bit earlier by starting your purple rock cress indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Lilburn. It might get as low as 5°F during the coldest months of winter.

Since the USDA zone info for Lilburn may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Since half of the time in Lilburn last frost occurs after April 15 be ready to protect your purple rock cress in the event of one of those late frosts.

USDA Zone Info for Lilburn

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 Lilburn

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