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

You will be able to determine when you can plant flowering maple by referring to the USDA zone info for Umatilla.

Planting Calendar for Flowering Maple

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

It's not a good idea to plant flowering maple until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant flowering maple in Umatilla 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. You probably don't want to wait any later than that or else 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

On average the last frost when the weather gets warmer is on April 15 in Umatilla. In the coldest months of winter you can expect an average low temperature of 5°F.

It's important to remember that USDA zone info for Umatilla is not always accurate and the actual date of last frost is different every year. Since half of the time in Umatilla it frosts late in the year after April 15 be ready to cover your flowering maple if you have one of those late frosts.

USDA Zone Info for Umatilla

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 Umatilla

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