The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In New Haven you can determine when you can plant perilla by looking at the USDA zone info.

Planting Calendar for Perilla

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

You can not plant perilla until after the last frost when the weather gets warmer because they do not do well in cold weather.

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

Last Frost Date

On average the last frost is on April 15 in New Haven. You can expect an average low temperature of -10°F in the coldest months of winter.

Since the USDA zone info for New Haven is just an average the actual date of last frost changes from year to year. Half of the time in New Haven it frosts late in the year after April 15 so just be sure to be ready to protect your perilla if you have one of those late frosts.

USDA Zone Info for New Haven

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 New Haven

You may be interested in your other planting guides for New Haven.