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.

By referring to the USDA zone info for Ishpeming it's a good idea to figure out when it's a good idea to plant potatos.

Planting Calendar for Potatos

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

You can plant potatos earlier in the year because they are one of those plants that can tolerate quite a bit of cold weather.

The earliest that you can plant potatos in Ishpeming 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 potatos and expect a good harvest is probably August. If you wait any later than that and your potatos may not have a chance to really do well. You can get started a few weeks earlier by starting your potatos indoors.

Last Frost Date

In Ishpeming the average date of last frost happens on May 15. It might get as low as -25°F during the coldest months of winter.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Ishpeming and it will vary from year to year. Half of the time in Ishpeming you get surprised by a frost after May 15 so always be ready to cover your potatos if you have a late frost.

USDA Zone Info for Ishpeming

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Ishpeming

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