The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of determining when it's a good idea to plant ageratum is to look at the USDA zone info for Litchfield.

Planting Calendar for Ageratum

Frost tolerance for ageratum:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since ageratum are not cold tolerant it's important to wait until after the last frost has passed before you can plant them.

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

Last Frost Date

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

Since the USDA zone info for Litchfield may not be accurate from year to year the actual date of last frost is different every year. Half of the time in Litchfield last frost occurs after April 15 so always be ready to cover your ageratum in the event of a late frost.

USDA Zone Info for Litchfield

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 Litchfield

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