Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of figuring out when you can plant perilla is to check out the USDA zone info for Rapid City.

Planting Calendar for Perilla

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

It's a bad idea to plant perilla until after the last frost because they do not do well in cold weather.

The earliest that you can plant perilla in Rapid City 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. Any later than that and your perilla may not have a chance to grow to maturity. You can get started a little bit earlier by starting your perilla indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Rapid City. In the coldest months of winter you should expect an average low temperature of -20°F.

Just be sure to remember that USDA zone info for Rapid City may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Rapid City you get a frost after April 15 so make sure that you are prepared to cover your perilla in the event of a late frost.

USDA Zone Info for Rapid City

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Rapid City

You may be interested in your other planting guides for Rapid City.