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

By looking at the USDA zone info for The Dalles you will be able to determine when it's possible to plant trachelium.

Planting Calendar for Trachelium

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

Since trachelium do not do well in cold weather you must wait until after the last frost when the weather gets warmer before you can plant them.

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

Last Frost Date

On average the last frost is on March 15 in The Dalles. You should expect an average low temperature of 10°F in the coldest months of winter.

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. Since half of the time in The Dalles there is a last frost after March 15 be ready to protect your trachelium 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.