Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The earliest that you can plant browallia in Pontiac should be figured out by using the USDA zone info.

Planting Calendar for Browallia

Frost tolerance for browallia:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably a bad idea to plant browallia until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant browallia in Pontiac 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. Any later than that and your browallia may not have a chance to fully mature. If you are starting your browallia indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Pontiac. You should expect an average low temperature of -10°F in the coldest months of winter.

Keep in mind that USDA zone info for Pontiac is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Pontiac you get surprised by a frost after April 15 so be sure to be ready to protect your browallia if you have one of those late frosts.

USDA Zone Info for Pontiac

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 Pontiac

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