The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. 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 Rhinelander can be reffered to in order to determine when it's possible to plant leeks.

Planting Calendar for Leeks

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

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

The earliest that you can plant leeks in Rhinelander 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. You probably don't want to wait any later than that or else 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

On average all chance of frost has passed is on May 15 in Rhinelander. You should expect an average low temperature of -30°F in the coldest months of winter.

It's important to remember that USDA zone info for Rhinelander is just an average and the actual date of last frost changes from year to year. Since half of the time in Rhinelander you get surprised by a frost after May 15 be ready to cover your leeks if you have one of those late frosts.

USDA Zone Info for Rhinelander

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 Rhinelander

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