Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Chelsea you can determine when you can plant impatiens by using the USDA zone info.

Planting Calendar for Impatiens

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

Impatiens are not cold tolerant which means that you have to wait until it warms up after the last frost before you can plant them.

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. Any later than that and your impatiens may not have a chance to fully mature. You can get started a little bit earlier by starting your impatiens indoors.

Last Frost Date

The average date of last frost is April 15 in Chelsea. You can expect an average low temperature of -5°F in the coldest months of winter.

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

USDA Zone Info for Chelsea

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Chelsea

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