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

It's a good idea to estimate when it's possible to plant ageratum by reviewing the USDA zone info for Mccomb.

Planting Calendar for Ageratum

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

Since ageratum require warm weather it's necessary to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant ageratum in Mccomb 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

On average the last frost is on March 15 in Mccomb. You should expect an average low temperature of 15°F in the coldest months of winter.

Keep in mind that USDA zone info for Mccomb is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Mccomb it frosts late in the year after March 15 so just be sure to be ready to cover your ageratum in the event of a surprise late frost.

USDA Zone Info for Mccomb

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Mccomb

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