The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The best time to plant snap beans in Waterloo can be determined by using the USDA zone info.

Planting Calendar for Snap beans

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

You can not plant snap beans until after the last frost when the weather gets warmer because they do not do well in cold weather.

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

Last Frost Date

In Waterloo the average date of last frost happens on April 15. It might get as low as -20°F during the coldest months of winter.

Keep in mind that the actual date of last frost is not always accurate because it is based on the USDA zone info for Waterloo and it changes from year to year. Half of the time in Waterloo last frost occurs after April 15 so just be sure to be ready to cover your snap beans if you have a surprise late frost.

USDA Zone Info for Waterloo

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Waterloo

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