One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. 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 Iron Mountain can be used to determine when it's possible to plant lavender cotton.

Planting Calendar for Lavender Cotton

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

Since lavender cotton are very cold tolerant you can plant them much earlier in the year than other frost tender plants.

The earliest that you can plant lavender cotton 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 lavender cotton and expect a good harvest is probably August. Any later than that and your lavender cotton may not have a chance to grow to maturity. Starting your lavender cotton indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost has passed is on May 15 in Iron Mountain. It might get as low as -30°F during the coldest months of winter.

Always keep in mind that USDA zone info for Iron Mountain is not always accurate and the actual date of last frost changes from year to year. Since half of the time in Iron Mountain last frost occurs after May 15 be ready to cover your lavender cotton if you have a surprise 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.