When to Plant Green beans in Monmouth, OR

One of the first steps you take when you are estimating 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.

The best time to plant green beans in Monmouth can be estimated by looking at the USDA zone info.


Planting Calendar for Green beans

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

Green beans are not cold tolerant which tells us that it is important to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant green beans
Possibly ok, but a risky time to plant green beans
Probably not a good time to plant green beans

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

Last Frost Date

The average date of last frost is March 15 in Monmouth. You can expect an average low temperature of 15°F in the coldest months of winter.

Since the USDA zone info for Monmouth is just an average the actual date of last frost will vary from year to year. Since half of the time in Monmouth there is a last frost after March 15 be ready to cover your green beans if you have a late frost.

USDA Zone Info for Monmouth

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 Low15°F
Highest Expected Low20°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 Monmouth

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