Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first opportunity to plant pentas in Northfield should be estimated by looking at the USDA zone info.

Planting Calendar for Pentas

Frost tolerance for pentas:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since pentas do not do well in cold weather you need to wait until after the last frost has passed before you can plant them.

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

Last Frost Date

On average all chance of frost has passed is on May 15 in Northfield. It might get as low as -25°F during the coldest months of winter.

It's important to remember that USDA zone info for Northfield is an average and the actual date of last frost changes from year to year. Half of the time in Northfield you get a frost after May 15 so just be sure to be ready to protect your pentas in the event of one of those late frosts.

USDA Zone Info for Northfield

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Northfield

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