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

In International Falls you can estimate when it's a good idea to plant caladium by referring to the USDA zone info.

Planting Calendar for Caladium

Frost tolerance for caladium:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

It's probably a bad idea to plant caladium until after the last frost has passed because they require warm weather.

The earliest that you can plant caladium in International Falls 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 caladium and expect a good harvest is probably August. If you wait any later than that and your caladium may not have a chance to really do well. You can get started a little bit earlier by starting your caladium indoors.

Last Frost Date

On average the last frost is on May 15 in International Falls. It might get as low as -40°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 International Falls and it can change quite a bit from year to year. Since half of the time in International Falls there is a last frost after May 15 be ready to protect your caladium in the event of a late frost.

USDA Zone Info for International Falls

Here is the info for USDA Zone 3a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-40°F
Highest Expected Low	-35°F

This means that on a really cold year, the coldest it will get is -40°F. On most years you should be prepared to experience lows near -35°F.

Plants to Grow in International Falls

You may be interested in your other planting guides for International Falls.