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.

You should be able to estimate when to plant leeks by looking at the USDA zone info for Clawson.

Planting Calendar for Leeks

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

Leeks do ok in a bit of cold which means that you can plant them earlier in the year than other plants that might not handle the cold.

The earliest that you can plant leeks in Clawson 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 leeks and expect a good harvest is probably September. Any later than that and your leeks may not have a chance to fully mature. You can get started a little bit earlier by starting your leeks indoors.

Last Frost Date

The average date of last frost is April 15 in Clawson. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Clawson is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Clawson it frosts late in the year after April 15 so always be ready to cover your leeks in the event of one of those late frosts.

USDA Zone Info for Clawson

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Clawson

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