One of the best tools that you have as gardeners to help us figure out 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 best time to plant browallia in Herndon should be estimated by checking out the USDA zone info.

Planting Calendar for Browallia

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

Since browallia require warm weather you have to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant browallia in Herndon 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. If you wait any later than that and your browallia may not have a chance to fully mature. You can get started a few weeks earlier by starting your browallia indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Herndon. In the coldest months of winter you should expect an average low temperature of 0°F.

It's important to remember that USDA zone info for Herndon is just an average and the actual date of last frost will vary from year to year. Since half of the time in Herndon last frost occurs after April 15 be ready to cover your browallia if you have a surprise late frost.

USDA Zone Info for Herndon

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 Herndon

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