One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Duluth you can determine when it's possible to plant flowering maple by looking at the USDA zone info.

Planting Calendar for Flowering Maple

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

It's a bad idea to plant flowering maple until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant flowering maple in Duluth is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant flowering maple and expect a good harvest is probably August. If you wait any later than that and your flowering maple may not have a chance to really do well. If you are starting your flowering maple indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Duluth the average date of last frost happens on April 15. It might get as low as 5°F during the coldest months of winter.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Duluth and it changes from year to year. Since half of the time in Duluth you get surprised by a frost after April 15 be ready to cover your flowering maple if you have a surprise late frost.

USDA Zone Info for Duluth

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Duluth

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