Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Herrin can be used to estimate when it's a good idea to plant gerbera.

Planting Calendar for Gerbera

Frost tolerance for gerbera:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

You can plant gerbera just a tiny bit earlier in the year because they are barely cold tolerant.

The earliest that you can plant gerbera in Herrin 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 gerbera and expect a good harvest is probably August. If you wait any later than that and your gerbera may not have a chance to grow to maturity. You can get started a little bit earlier by starting your gerbera indoors.

Last Frost Date

The average date of last frost is April 15 in Herrin. You should expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Herrin is not always accurate the actual date of last frost is different every year. Half of the time in Herrin it frosts late in the year after April 15 so just be sure to be ready to protect your gerbera 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.