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.

A way of determining when it's the best time to plant leeks is to consult the USDA zone info for Manitowoc.

Planting Calendar for Leeks

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

Leeks tend to make it in pretty solid cold which means that 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 Manitowoc 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. If you wait any later than that and your leeks may not have a chance to fully mature. You can get started a few weeks earlier by starting your leeks indoors.

Last Frost Date

The average date of last frost is April 15 in Manitowoc. In the coldest months of winter you can expect an average low temperature of -15°F.

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

USDA Zone Info for Manitowoc

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Manitowoc

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