Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of determining when to plant lisianthus is to use the USDA zone info for Petal.

Planting Calendar for Lisianthus

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

Since lisianthus do not do well in cold weather you really should wait until after the last frost before you can plant them.

The earliest that you can plant lisianthus 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 lisianthus and expect a good harvest is probably August. You probably don't want to wait any later than that or else your lisianthus may not have a chance to grow to maturity. You can get started a little bit earlier by starting your lisianthus indoors.

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 can change quite a bit from year to year. Half of the time in Petal last frost occurs after March 15 so make sure that you are prepared to protect your lisianthus if you have a surprise 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.