One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of estimating when to plant ageratum is to examine the USDA zone info for Grenada.

Planting Calendar for Ageratum

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

Since ageratum do not do well in cold weather you have to wait until after the last frost before you can plant them.

The earliest that you can plant ageratum in Grenada 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. If you wait any later than that and your ageratum may not have a chance to really do well. If you are starting your ageratum indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost is on March 15 in Grenada. It might get as low as 10°F during the coldest months of winter.

Since the USDA zone info for Grenada is not always accurate the actual date of last frost is different every year. Half of the time in Grenada it frosts late in the year after March 15 so always be ready to cover your ageratum if you have a late frost.

USDA Zone Info for Grenada

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°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 15°F.

Plants to Grow in Grenada

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