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.

You will be able to figure out when it's the best time to plant impatiens by looking at the USDA zone info for Manassas.

Planting Calendar for Impatiens

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

You can not plant impatiens until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant impatiens in Manassas 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 impatiens and expect a good harvest is probably August. Any later than that and your impatiens may not have a chance to grow to maturity. You can get started a little bit earlier by starting your impatiens indoors.

Last Frost Date

On average the last frost is on April 15 in Manassas. It might get as low as 0°F during the coldest months of winter.

Always keep in mind that USDA zone info for Manassas is just an average and the actual date of last frost changes from year to year. Since half of the time in Manassas you get surprised by a frost after April 15 be ready to cover your impatiens in the event of a surprise late frost.

USDA Zone Info for Manassas

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 Manassas

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