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.

In Romulus you can determine when to plant perilla by referring to the USDA zone info.

Planting Calendar for Perilla

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

Since perilla do not do well in cold weather you need to wait until after the last frost before you can plant them.

The earliest that you can plant perilla in Romulus 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 fully mature. You can get started a few weeks earlier by starting your perilla indoors.

Last Frost Date

The average date of last frost is April 15 in Romulus. In the coldest months of winter you should expect an average low temperature of -10°F.

Remember that USDA zone info for Romulus is not always accurate and the actual date of last frost is different every year. Half of the time in Romulus there is a last frost after April 15 so always be ready to cover your perilla in the event of a late frost.

USDA Zone Info for Romulus

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 Romulus

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