One of the first steps you take when you are getting a good idea 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.

By checking out the USDA zone info for Princeton it's possible to determine when you can plant runner beans.

Planting Calendar for Runner beans

Frost tolerance for runner beans:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since runner beans require warm weather you must wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant runner beans in Princeton 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 runner beans and expect a good harvest is probably August. If you wait any later than that and your runner beans may not have a chance to fully mature. You can get started a few weeks earlier by starting your runner beans indoors.

Last Frost Date

The average date of last frost is May 15 in Princeton. You should expect an average low temperature of -30°F in the coldest months of winter.

Always keep in mind that USDA zone info for Princeton is just an average and the actual date of last frost is different every year. Since half of the time in Princeton there is a last frost after May 15 be ready to protect your runner beans if you have a surprise late frost.

USDA Zone Info for Princeton

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Princeton

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