The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Jacksonville can be reviewed to figure out when you can plant alternaria.

Planting Calendar for Alternaria

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

Since alternaria require warm weather you really should wait until after the last frost has passed before you can plant them.

The earliest that you can plant alternaria in Jacksonville 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 alternaria and expect a good harvest is probably August. If you wait any later than that and your alternaria may not have a chance to fully mature. Starting your alternaria indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on March 15 in Jacksonville. In the coldest months of winter you can expect an average low temperature of 15°F.

Since the USDA zone info for Jacksonville is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Jacksonville you get surprised by a frost after March 15 so always be ready to cover your alternaria if you have a surprise late frost.

USDA Zone Info for Jacksonville

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 Jacksonville

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