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.

A way of estimating when it's a good idea to plant campanula is to check out the USDA zone info for Prairie Du Chien.

Planting Calendar for Campanula

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

Campanula do well in mild cold which means that you can plant them just a bit earlier in the year than other frost tender plants.

The earliest that you can plant campanula in Prairie Du Chien 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 campanula and expect a good harvest is probably September. If you wait any later than that and your campanula may not have a chance to fully mature. If you are starting your campanula indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In Prairie Du Chien the average date of last frost happens on April 15. You can expect an average low temperature of -20°F in the coldest months of winter.

Remember that USDA zone info for Prairie Du Chien is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Prairie Du Chien you get surprised by a frost after April 15 so always be ready to protect your campanula if you have a surprise late frost.

USDA Zone Info for Prairie Du Chien

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°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 -15°F.

Plants to Grow in Prairie Du Chien

You may be interested in your other planting guides for Prairie Du Chien.