One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Williston should be looked at to determine when it's a good idea to plant savoy cabbage.

Planting Calendar for Savoy cabbage

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

Since savoy cabbage do well in cold you can plant them much earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant savoy cabbage in Williston is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant savoy cabbage and expect a good harvest is probably August. You probably don't want to wait any later than that or else your savoy cabbage may not have a chance to fully mature. You can get started a few weeks earlier by starting your savoy cabbage indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Williston. It might get as low as -30°F during the coldest months of winter.

Always keep in mind that USDA zone info for Williston is just an average and the actual date of last frost is different every year. Since half of the time in Williston there is a last frost after May 15 be ready to protect your savoy cabbage if you have a late frost.

USDA Zone Info for Williston

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Williston

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