The USDA Zone info is a great tool for gardeners to help us figure out 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 common way of figuring out when it's possible to plant perilla is to examine the USDA zone info for Harrisburg.

Planting Calendar for Perilla

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

Perilla are not cold tolerant which tells us that you must wait until it warms up after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant perilla in Harrisburg is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant perilla and expect a good harvest is probably August. You probably don't want to wait any later than that or else your perilla may not have a chance to really do well. You can get started a few weeks earlier by starting your perilla indoors.

Last Frost Date

In Harrisburg the average date of last frost happens on April 15. You can expect an average low temperature of 5°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Harrisburg may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Harrisburg it frosts late in the year after April 15 so make sure that you are ready to cover your perilla if you have one of those late frosts.

USDA Zone Info for Harrisburg

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 Harrisburg

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