One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. 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 trailing portulaca in The Dalles should be figured out by checking out the USDA zone info.

Planting Calendar for Trailing Portulaca

Frost tolerance for trailing portulaca:	Not tolerant of frost.
When to plant:	After the last frost.

It's probably not a good idea to plant trailing portulaca until after the last frost because they are not cold tolerant.

The earliest that you can plant trailing portulaca in The Dalles 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 trailing portulaca and expect a good harvest is probably August. You probably don't want to wait any later than that or else your trailing portulaca may not have a chance to fully mature. You can get started a little bit earlier by starting your trailing portulaca indoors.

Last Frost Date

In The Dalles the average date of last frost happens on March 15. It might get as low as 10°F during the coldest months of winter.

It's important to remember that USDA zone info for The Dalles may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in The Dalles you get a frost after March 15 so make sure that you are ready to protect your trailing portulaca if you have one of those late frosts.

USDA Zone Info for The Dalles

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

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

Plants to Grow in The Dalles

You may be interested in your other planting guides for The Dalles.