One of the best tools that you have as gardeners to help us estimate your gardening schedule is the 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.

The best time to plant argyranthemum in The Dalles should be determined by checking out the USDA zone info.

Planting Calendar for Argyranthemum

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

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

Last Frost Date

On average all chance of frost has passed is on March 15 in The Dalles. In the coldest months of winter you should expect an average low temperature of 10°F.

It's important to remember that USDA zone info for The Dalles is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in The Dalles you get surprised by a frost after March 15 so just be sure to be ready to protect your argyranthemum if you have a surprise 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.