One of the best tools that you have as gardeners to help us estimate 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.

A way of determining when it's the best time to plant morning glory is to look at the USDA zone info for Petal.

Planting Calendar for Morning Glory

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

It's not a good idea to plant morning glory until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant morning glory in Petal 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 morning glory and expect a good harvest is probably August. Any later than that and your morning glory may not have a chance to fully mature. If you are starting your morning glory indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

The average date of last frost is March 15 in Petal. It might get as low as 15°F during the coldest months of winter.

Since the USDA zone info for Petal is just an average the actual date of last frost is different every year. Half of the time in Petal you get a frost after March 15 so make sure that you are ready to cover your morning glory in the event of a late frost.

USDA Zone Info for Petal

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 Petal

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