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.

It's possible to estimate when it's a good idea to plant nolana by reviewing the USDA zone info for Iron Mountain.

Planting Calendar for Nolana

Frost tolerance for nolana:	Not tolerant of frost.
When to plant:	After the last frost.

It's probably not a good idea to plant nolana until after all chance of frost has passed because they require warm weather.

The earliest that you can plant nolana in Iron Mountain is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant nolana and expect a good harvest is probably August. Any later than that and your nolana may not have a chance to grow to maturity. Starting your nolana indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Since the USDA zone info for Iron Mountain may not be accurate from year to year the actual date of last frost changes from year to year. Since half of the time in Iron Mountain it frosts late in the year after May 15 be ready to cover your nolana in the event of 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.