One of the best tools that you have as gardeners to help us determine 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.

It's possible to figure out when it's a good idea to plant spearmint by referring to the USDA zone info for Forest Lake.

Planting Calendar for Spearmint

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

You can plant spearmint earlier in the year because they do well in cold.

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

Last Frost Date

On average all chance of frost has passed is on May 15 in Forest Lake. In the coldest months of winter you can expect an average low temperature of -25°F.

Since the USDA zone info for Forest Lake is not always accurate the actual date of last frost changes from year to year. Half of the time in Forest Lake last frost occurs after May 15 so make sure that you are prepared to cover your spearmint if you have one of those late frosts.

USDA Zone Info for Forest Lake

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 Forest Lake

You may be interested in your other planting guides for Forest Lake.