The USDA Zone info is a great tool for gardeners to help us determine 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 dianthus in Montpelier can be determined by reviewing 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.

Since dianthus are moderately cold tolerant you can plant them a little bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant dianthus in Montpelier 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 dianthus and expect a good harvest is probably August. Any later than that and your dianthus may not have a chance to really do well. Starting your dianthus indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost has passed is on May 15 in Montpelier. You should expect an average low temperature of -25°F in the coldest months of winter.

Always keep in mind that USDA zone info for Montpelier is not always accurate and the actual date of last frost changes from year to year. Half of the time in Montpelier there is a last frost after May 15 so just be sure to be ready to protect your dianthus in the event of a late frost.

USDA Zone Info for Montpelier

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 Montpelier

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