Before planting it is a good idea to find your USDA Zone info to determine 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 way of figuring out when it's possible to plant lemon balm is to look at the USDA zone info for University Park.

Planting Calendar for Lemon balm

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

Since lemon balm are barely cold tolerant you can plant them just a tiny bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant lemon balm in University Park 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 lemon balm and expect a good harvest is probably August. You probably don't want to wait any later than that or else your lemon balm may not have a chance to grow to maturity. Starting your lemon balm indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost is on April 15 in University Park. In the coldest months of winter you should expect an average low temperature of 5°F.

Since the USDA zone info for University Park is not always accurate the actual date of last frost will vary from year to year. Half of the time in University Park there is a last frost after April 15 so make sure that you are ready to cover your lemon balm if you have a late frost.

USDA Zone Info for University Park

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°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 10°F.

Plants to Grow in University Park

You may be interested in your other planting guides for University Park.