Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Jacksonville you can determine when it's a good idea to plant onions by referring to the USDA zone info.

Planting Calendar for Onions

Frost tolerance for onions:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Onions do well in cold which means that you can get them planted much earlier than more sensitive plants.

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

The last month that you can plant onions and expect a good harvest is probably September. You probably don't want to wait any later than that or else your onions may not have a chance to really do well. Starting your onions indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is March 15 in Jacksonville. In the coldest months of winter you can expect an average low temperature of 15°F.

Remember that USDA zone info for Jacksonville is an average and the actual date of last frost is different every year. Half of the time in Jacksonville you get a frost after March 15 so always be ready to cover your onions in the event of a 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.