Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to figure out when it's the best time to plant monkey flower by using the USDA zone info for Minneapolis.

Planting Calendar for Monkey Flower

Frost tolerance for monkey flower:	Not tolerant of frost.
When to plant:	After the last frost has passed.

It's probably a bad idea to plant monkey flower until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant monkey flower in Minneapolis 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 monkey flower and expect a good harvest is probably August. If you wait any later than that and your monkey flower may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your monkey flower indoors.

Last Frost Date

On average the last frost is on May 15 in Minneapolis. It might get as low as -25°F during the coldest months of winter.

Keep in mind that USDA zone info for Minneapolis is an average and the actual date of last frost changes from year to year. Since half of the time in Minneapolis it frosts late in the year after May 15 be ready to cover your monkey flower in the event of a surprise late frost.

USDA Zone Info for Minneapolis

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 Minneapolis

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