The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of determining when to plant string beans is to examine the USDA zone info for Chehalis.

Planting Calendar for String beans

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

It's probably not a good idea to plant string beans until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant string beans in Chehalis 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 string beans and expect a good harvest is probably August. You probably don't want to wait any later than that or else your string beans may not have a chance to grow to maturity. Starting your string beans indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Since the USDA zone info for Chehalis is not always accurate the actual date of last frost will vary from year to year. Half of the time in Chehalis last frost occurs after March 15 so always be ready to protect your string beans if you have one of those late frosts.

USDA Zone Info for Chehalis

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 Chehalis

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