The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first chance to plant morning glory in Umatilla can be determined by looking at the USDA zone info.

Planting Calendar for Morning Glory

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

Since morning glory are not cold tolerant you must wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant morning glory 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 morning glory and expect a good harvest is probably August. Any later than that and your morning glory may not have a chance to really do well. If you are starting your morning glory indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Umatilla the average date of last frost happens on April 15. You can expect an average low temperature of 5°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Umatilla is just an average and the actual date of last frost will vary from year to year. Since half of the time in Umatilla it frosts late in the year after April 15 be ready to protect your morning glory if you have a surprise late frost.

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.