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.

By looking at the USDA zone info for River Rouge you will be able to estimate when you can plant canna.

Planting Calendar for Canna

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

You can not plant canna until after the last frost when the weather gets warmer because they are not cold tolerant.

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

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in River Rouge. You should expect an average low temperature of -5°F in the coldest months of winter.

Remember that USDA zone info for River Rouge is an average and the actual date of last frost is different every year. Since half of the time in River Rouge you get a frost after April 15 be ready to protect your canna if you have a late frost.

USDA Zone Info for River Rouge

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°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 0°F.

Plants to Grow in River Rouge

You may be interested in your other planting guides for River Rouge.