One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By using the USDA zone info for Umatilla you will be able to determine when you can plant eggplants.

Planting Calendar for Eggplants

Frost tolerance for eggplants:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since eggplants do not do well in cold weather it is necessary to wait until after the last frost has passed before you can plant them.

The earliest that you can plant eggplants 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 eggplants and expect a good harvest is probably August. If you wait any later than that and your eggplants may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your eggplants indoors.

Last Frost Date

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

Just be sure to remember that the actual date of last frost is an average because it is based on the USDA zone info for Umatilla and it will vary from year to year. Half of the time in Umatilla last frost occurs after April 15 so be sure to be ready to protect your eggplants 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.