Before planting it is a good idea to find your USDA Zone info to estimate 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.

The first chance to plant caladium in Portland should be estimated by reviewing the USDA zone info.

Planting Calendar for Caladium

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

Since caladium require warm weather you need to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant caladium in Portland 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. You probably don't want to wait any later than that or else your caladium may not have a chance to really do well. Starting your caladium indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Portland. It might get as low as -15°F during the coldest months of winter.

Since the USDA zone info for Portland is not always accurate the actual date of last frost will vary from year to year. Since half of the time in Portland there is a last frost after April 15 be ready to protect your caladium in the event of one of those late frosts.

USDA Zone Info for Portland

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Portland

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