One of the first steps you take when you are making a decision about 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 can estimate when it's possible to plant leeks in Duluth by reviewing the USDA zone info.

Planting Calendar for Leeks

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

Since leeks are very cold tolerant you can plant them a lot earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant leeks 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 leeks and expect a good harvest is probably August. If you wait any later than that and your leeks may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your leeks indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Duluth. In the coldest months of winter you should expect an average low temperature of -30°F.

Since the USDA zone info for Duluth is an average the actual date of last frost changes from year to year. Since half of the time in Duluth it frosts late in the year after May 15 be ready to cover your leeks if you have 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.