One of the first steps you take when you are estimating your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's possible to estimate when it's a good idea to plant hibiscus by looking at the USDA zone info for The Dalles.

Planting Calendar for Hibiscus

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

You really shouldn't plant hibiscus until after the last frost when the weather gets warmer because they do not do well in cold weather.

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

Last Frost Date

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

Just be sure 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 it frosts late in the year after March 15 so always be ready to protect your hibiscus if you have a late frost.

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.