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

You should be able to estimate when to plant iberis by reviewing the USDA zone info for Williamsburg.

Planting Calendar for Iberis

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

Iberis are moderately cold tolerant which means that you can plant them a little bit earlier than other frost tender plants.

The earliest that you can plant iberis in Williamsburg 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 iberis and expect a good harvest is probably September. If you wait any later than that and your iberis may not have a chance to really do well. You can get started a couple of weeks earlier by starting your iberis indoors.

Last Frost Date

The average date of last frost is April 15 in Williamsburg. It might get as low as -5°F during the coldest months of winter.

Remember that USDA zone info for Williamsburg may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Williamsburg last frost occurs after April 15 so make sure that you are prepared to protect your iberis if you have a surprise late frost.

USDA Zone Info for Williamsburg

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Williamsburg

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