One of the first steps you take when you are getting a good idea 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.

The USDA zone info for Duluth can be reviewed to estimate when it's the best time 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.

Savoy cabbage are very cold tolerant which tells us that you can plant them much earlier than more sensitive plants.

The earliest that you can plant savoy cabbage in Duluth 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. Any later than that and your savoy cabbage may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your savoy cabbage indoors.

Last Frost Date

The average date of last frost is May 15 in Duluth. It might get as low as -30°F during the coldest months of winter.

Keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Duluth and it will vary from year to year. Since half of the time in Duluth last frost occurs after May 15 be ready to protect your savoy cabbage in the event of a surprise late frost.

USDA Zone Info for Duluth

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 Duluth

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