One of the best tools that you have as gardeners to help us determine 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 first opportunity to plant pole beans in Seattle can be determined by looking at the USDA zone info.

Planting Calendar for Pole beans

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

Pole beans require warm weather which tells us that you must wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant pole beans in Seattle 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 pole beans and expect a good harvest is probably August. You probably don't want to wait any later than that or else your pole beans may not have a chance to grow to maturity. Starting your pole 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 Seattle. It might get as low as 15°F during the coldest months of winter.

Remember that USDA zone info for Seattle is an average and the actual date of last frost is different every year. Since half of the time in Seattle you get surprised by a frost after March 15 be ready to protect your pole beans if you have one of those late frosts.

USDA Zone Info for Seattle

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 Seattle

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