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

The USDA zone info for East Grand Forks can be read to determine when to plant ageratum.

Planting Calendar for Ageratum

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

It's not a good idea to plant ageratum until after the last frost because they do not do well in cold weather.

The earliest that you can plant ageratum in East Grand Forks is May. However, you really should wait until June 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. You probably don't want to wait any later than that or else your ageratum may not have a chance to really do well. Starting your ageratum indoors is a great way to get them started a little bit earlier.

Last Frost Date

In East Grand Forks the average date of last frost happens on May 15. It might get as low as -30°F during the coldest months of winter.

Since the USDA zone info for East Grand Forks may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in East Grand Forks you get surprised by a frost after May 15 so just be sure to be ready to protect your ageratum if you have a surprise late frost.

USDA Zone Info for East Grand Forks

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in East Grand Forks

You may be interested in your other planting guides for East Grand Forks.