One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to estimate when you can plant sweet williams by reviewing the USDA zone info for Zone 8b.

Planting Calendar for Sweet Williams

Frost tolerance for sweet williams:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Sweet Williams do well in mild cold which means that you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant sweet williams in Zone 8b 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 sweet williams and expect a good harvest is probably September. If you wait any later than that and your sweet williams may not have a chance to fully mature. You can get started a few weeks earlier by starting your sweet williams indoors.

Last Frost Date

The average date of last frost is March 15 in Zone 8b. In the coldest months of winter you can expect an average low temperature of 15°F.

Always keep in mind that USDA zone info for Zone 8b is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Zone 8b it frosts late in the year after March 15 so be sure to be ready to cover your sweet williams in the event of a late frost.

USDA Zone Info for Zone 8b

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 Zone 8b

You may be interested in your other planting guides for Zone 8b.