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.

A way of getting a good idea when it's possible to plant campanula is to check out the USDA zone info for Dayton.

Planting Calendar for Campanula

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

Campanula can survive in a little bit of cold which tells us that you can plant them a bit earlier in the year than other plants that might not handle the cold.

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

The last month that you can plant campanula and expect a good harvest is probably October. Any later than that and your campanula may not have a chance to fully mature. You can get started a little bit earlier by starting your campanula indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Dayton. You should expect an average low temperature of 20°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Dayton is an average and the actual date of last frost is different every year. Since half of the time in Dayton you get surprised by a frost after February 15 be ready to protect your campanula if you have a late frost.

USDA Zone Info for Dayton

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Dayton

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