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

The USDA zone info for Portland should be looked at to determine when to plant eggplants.

Planting Calendar for Eggplants

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

It's not a good idea to plant eggplants until after the last frost has passed because they require warm weather.

The earliest that you can plant eggplants 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 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 fully mature. 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 Portland. In the coldest months of winter you should expect an average low temperature of -15°F.

Always keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Portland and it can change quite a bit from year to year. Half of the time in Portland last frost occurs after April 15 so always be ready to protect your eggplants if you have a late frost.

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.