The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Birmingham can be reffered to in order to determine when it's the best time to plant browallia.

Planting Calendar for Browallia

Frost tolerance for browallia:	Not tolerant of frost.
When to plant:	After the last frost has passed.

You should not plant browallia until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant browallia in Birmingham 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 browallia and expect a good harvest is probably August. You probably don't want to wait any later than that or else your browallia may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your browallia indoors.

Last Frost Date

The average date of last frost is April 15 in Birmingham. It might get as low as -10°F during the coldest months of winter.

It's important to remember that the actual date of last frost is an average because it is based on the USDA zone info for Birmingham and it changes from year to year. Since half of the time in Birmingham you get a frost after April 15 be ready to cover your browallia in the event of one of those late frosts.

USDA Zone Info for Birmingham

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 Birmingham

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