Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of getting a good idea when to plant sweet peas is to refer to the USDA zone info for Suffolk.

Planting Calendar for Sweet Peas

Frost tolerance for sweet peas:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Sweet Peas do well in mild cold which tells us that you can plant them just a tiny bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant sweet peas in Suffolk 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 sweet peas and expect a good harvest is probably August. If you wait any later than that and your sweet peas may not have a chance to really do well. If you are starting your sweet peas indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Suffolk the average date of last frost happens on March 15. It might get as low as 10°F during the coldest months of winter.

Since the USDA zone info for Suffolk is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Suffolk there is a last frost after March 15 so be sure to be ready to protect your sweet peas if you have one of those late frosts.

USDA Zone Info for Suffolk

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Suffolk

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