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

You will be able to estimate when it's a good idea to plant perilla by referring to the USDA zone info for Harlingen.

Planting Calendar for Perilla

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

Perilla require warm weather which tells us that you really should wait until it warms up after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant perilla in Harlingen is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant perilla and expect a good harvest is probably September. 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 February 15 in Harlingen. It might get as low as 25°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Harlingen is not always accurate and the actual date of last frost is different every year. Half of the time in Harlingen there is a last frost after February 15 so just be sure to be ready to protect your perilla if you have one of those late frosts.

USDA Zone Info for Harlingen

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Harlingen

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