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.

One way of estimating when it's possible to plant ageratum is to refer to the USDA zone info for Westwego.

Planting Calendar for Ageratum

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

Ageratum do not do well in cold weather which tells us that you really should wait until it warms up after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant ageratum in Westwego is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant ageratum and expect a good harvest is probably September. If you wait any later than that and your ageratum may not have a chance to grow to maturity. Starting your ageratum indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on February 15 in Westwego. In the coldest months of winter you should expect an average low temperature of 25°F.

Keep in mind that USDA zone info for Westwego 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 Westwego you get a frost after February 15 so make sure that you are ready to protect your ageratum in the event of a surprise late frost.

USDA Zone Info for Westwego

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

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

Plants to Grow in Westwego

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