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

One way of estimating when it's possible to plant purple rock cress is to check out the USDA zone info for Baton Rouge.

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 do well in cold which tells us that you can plant them much earlier than other frost tender plants.

The earliest that you can plant purple rock cress in Baton Rouge 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 really do well. Starting your purple rock cress indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost is on March 15 in Baton Rouge. It might get as low as 15°F during the coldest months of winter.

Since the USDA zone info for Baton Rouge is not always accurate the actual date of last frost can change quite a bit from year to year. Since half of the time in Baton Rouge last frost occurs after March 15 be ready to cover your purple rock cress in the event of one of those late frosts.

USDA Zone Info for Baton Rouge

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Baton Rouge

You may be interested in your other planting guides for Baton Rouge.