The USDA Zone info is a great tool for gardeners to help us figure out 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.

You should be able to estimate when it's the best time to plant impatiens by checking out the USDA zone info for Chelsea.

Planting Calendar for Impatiens

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

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

The earliest that you can plant impatiens in Chelsea 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. If you wait 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 when the weather gets warmer is on March 15 in Chelsea. In the coldest months of winter you should expect an average low temperature of 10°F.

Always keep in mind that USDA zone info for Chelsea is not always accurate and the actual date of last frost changes from year to year. Half of the time in Chelsea it frosts late in the year after March 15 so always be ready to protect your impatiens in the event of a late frost.

USDA Zone Info for Chelsea

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°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 15°F.

Plants to Grow in Chelsea

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