One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of estimating when it's possible to plant scarlet runner beans is to look at the USDA zone info for Wasco.

Planting Calendar for Scarlet Runner Beans

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

You can not plant scarlet runner beans 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 scarlet runner beans in Wasco is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant scarlet runner beans and expect a good harvest is probably September. If you wait any later than that and your scarlet runner beans may not have a chance to really do well. You can get started a little bit earlier by starting your scarlet runner beans indoors.

Last Frost Date

On average the last frost is on February 15 in Wasco. You should expect an average low temperature of 20°F in the coldest months of winter.

It's important to remember that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Wasco and it will vary from year to year. Half of the time in Wasco last frost occurs after February 15 so always be ready to protect your scarlet runner beans if you have one of those late frosts.

USDA Zone Info for Wasco

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Wasco

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