The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The first chance to plant torenia in Washougal should be estimated by referring to the USDA zone info.

Planting Calendar for Torenia

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

Since torenia do not do well in cold weather it's important to wait until after the last frost before you can plant them.

The earliest that you can plant torenia in Washougal 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 torenia and expect a good harvest is probably August. If you wait any later than that and your torenia may not have a chance to really do well. You can get started a couple of weeks earlier by starting your torenia indoors.

Last Frost Date

On average the last frost has passed is on March 15 in Washougal. It might get as low as 15°F during the coldest months of winter.

Since the USDA zone info for Washougal is just an average the actual date of last frost changes from year to year. Since half of the time in Washougal last frost occurs after March 15 be ready to cover your torenia in the event of a late frost.

USDA Zone Info for Washougal

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°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 20°F.

Plants to Grow in Washougal

You may be interested in your other planting guides for Washougal.