When to Plant Perilla in Iowa City, IA

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.

In Iowa City you can estimate when it's possible to plant perilla by using the USDA zone info.

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Planting Calendar for Perilla

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

It's a bad idea to plant perilla until after the last frost because they are not cold tolerant.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant perilla
Possibly ok, but a risky time to plant perilla
Probably not a good time to plant perilla

The earliest that you can plant perilla in Iowa 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 fully mature. Starting your perilla indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Iowa City. You should expect an average low temperature of -15°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Iowa City is not always accurate and the actual date of last frost is different every year. Half of the time in Iowa City it frosts late in the year after April 15 so be sure to be ready to protect your perilla in the event of a surprise late frost.

USDA Zone Info for Iowa City

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Iowa City

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