Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Poplar Bluff you can figure out when to plant ageratum by referring to the USDA zone info.

Planting Calendar for Ageratum

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

Since ageratum require warm weather it's important to wait until after the last frost before you can plant them.

The earliest that you can plant ageratum in Poplar Bluff 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 really do well. Starting your ageratum indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Poplar Bluff. It might get as low as 0°F during the coldest months of winter.

It's important to remember that USDA zone info for Poplar Bluff is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Poplar Bluff there is a last frost after April 15 so make sure that you are ready to cover your ageratum in the event of a late frost.

USDA Zone Info for Poplar Bluff

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 Poplar Bluff

You may be interested in your other planting guides for Poplar Bluff.