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.

One way of determining when you can plant violets is to consult the USDA zone info for Herrin.

Planting Calendar for Violets

Frost tolerance for violets:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since violets do well in moderate cold you can plant them a little bit earlier in the year than more sensitive plants.

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

The last month that you can plant violets and expect a good harvest is probably September. Any later than that and your violets may not have a chance to really do well. You can get started a little bit earlier by starting your violets indoors.

Last Frost Date

On average the last frost is on April 15 in Herrin. It might get as low as -5°F during the coldest months of winter.

Keep in mind that USDA zone info for Herrin is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Herrin you get a frost after April 15 so just be sure to be ready to cover your violets if you have a surprise late frost.

USDA Zone Info for Herrin

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Herrin

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