One of the first steps you take when you are figuring out 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 field peas in Zone 4a should be estimated by checking out the USDA zone info.

Planting Calendar for Field Peas

Frost tolerance for field peas:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since field peas are moderately cold tolerant you can plant them a little earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant field peas in Zone 4a is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant field peas and expect a good harvest is probably August. If you wait any later than that and your field peas may not have a chance to grow to maturity. If you are starting your field peas indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is May 15 in Zone 4a. It might get as low as -30°F during the coldest months of winter.

Keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Zone 4a and it changes from year to year. Since half of the time in Zone 4a last frost occurs after May 15 be ready to cover your field peas in the event of one of those late frosts.

USDA Zone Info for Zone 4a

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 Zone 4a

You may be interested in your other planting guides for Zone 4a.