The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Iron Mountain you can estimate when it's a good idea to plant asparagus peas by referring to the USDA zone info.

Planting Calendar for Asparagus peas

Frost tolerance for asparagus peas:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Asparagus peas do well in moderate cold which means that you can get them planted earlier than plants that are more sensitive to the cold.

The earliest that you can plant asparagus peas in Iron Mountain 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 asparagus peas and expect a good harvest is probably August. You probably don't want to wait any later than that or else your asparagus peas may not have a chance to really do well. You can get started a few weeks earlier by starting your asparagus peas indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Iron Mountain. 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 Iron Mountain is an average and the actual date of last frost changes from year to year. Half of the time in Iron Mountain last frost occurs after May 15 so always be ready to cover your asparagus peas if you have a late frost.

USDA Zone Info for Iron Mountain

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 Iron Mountain

You may be interested in your other planting guides for Iron Mountain.