One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Struthers can be read to figure out when it's possible to plant perilla.

Planting Calendar for Perilla

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

Since perilla require warm weather you really should wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant perilla in Struthers 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. If you wait any later than that and your perilla may not have a chance to fully mature. Starting your perilla indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in Struthers. In the coldest months of winter you should expect an average low temperature of -10°F.

Since the USDA zone info for Struthers may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Struthers you get surprised by a frost after April 15 so be sure to be ready to protect your perilla if you have a surprise late frost.

USDA Zone Info for Struthers

Here is the info for USDA Zone 6a.

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

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Struthers

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