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.

A way of getting a good idea when to plant monarda is to examine the USDA zone info for Coraopolis.

Planting Calendar for Monarda

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

Monarda do well in some 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 monarda in Coraopolis 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 monarda and expect a good harvest is probably August. You probably don't want to wait any later than that or else your monarda may not have a chance to grow to maturity. You can get started a little bit earlier by starting your monarda indoors.

Last Frost Date

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

Since the USDA zone info for Coraopolis is just an average the actual date of last frost is different every year. Since half of the time in Coraopolis you get a frost after April 15 be ready to cover your monarda in the event of a surprise late frost.

USDA Zone Info for Coraopolis

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 Coraopolis

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