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

In Groton you can estimate when it's possible to plant dianthus by referring to the USDA zone info.

Planting Calendar for Dianthus

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

You can plant dianthus a little earlier in the year because they do well in moderate cold.

The earliest that you can plant dianthus in Groton is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant dianthus and expect a good harvest is probably September. If you wait any later than that and your dianthus may not have a chance to grow to maturity. You can get started a little bit earlier by starting your dianthus indoors.

Last Frost Date

The average date of last frost is April 15 in Groton. You should expect an average low temperature of -5°F in the coldest months of winter.

Always keep in mind that USDA zone info for Groton may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Groton it frosts late in the year after April 15 so be sure to be ready to protect your dianthus in the event of a late frost.

USDA Zone Info for Groton

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Groton

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