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 earliest that you can plant caladium in Duluth can be determined by looking at the USDA zone info.

Planting Calendar for Caladium

Frost tolerance for caladium:	Not tolerant of frost.
When to plant:	After the last frost.

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

The earliest that you can plant caladium 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 caladium and expect a good harvest is probably August. Any later than that and your caladium may not have a chance to fully mature. If you are starting your caladium indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Duluth. In the coldest months of winter you should expect an average low temperature of 5°F.

Always keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Duluth and it can change quite a bit from year to year. Half of the time in Duluth last frost occurs after April 15 so just be sure to be ready to protect your caladium 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.