One of the best tools that you have as gardeners to help us figure out 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.

A way of determining when it's possible to plant scarlet runner beans is to check out the USDA zone info for Potsdam.

Planting Calendar for Scarlet Runner Beans

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

Since scarlet runner beans are not cold tolerant you must wait until after the last frost has passed before you can plant them.

The earliest that you can plant scarlet runner beans in Potsdam is May. However, you really should wait until June 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 August. Any later than that and your scarlet runner beans may not have a chance to fully mature. Starting your scarlet runner beans indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Potsdam. It might get as low as -25°F during the coldest months of winter.

It's important to remember that USDA zone info for Potsdam may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Potsdam you get a frost after May 15 so always be ready to cover your scarlet runner beans in the event of one of those late frosts.

USDA Zone Info for Potsdam

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

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

Plants to Grow in Potsdam

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