Before planting it is a good idea to find your USDA Zone info to estimate 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 figure out when it's a good idea to plant osteospermum by looking at the USDA zone info for Chippewa Falls.

Planting Calendar for Osteospermum

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

Osteospermum do ok in a little bit of cold which tells us that you can plant them a bit earlier in the year than more sensitive plants.

The earliest that you can plant osteospermum in Chippewa Falls 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 osteospermum and expect a good harvest is probably August. If you wait any later than that and your osteospermum may not have a chance to fully mature. Starting your osteospermum indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is May 15 in Chippewa Falls. In the coldest months of winter you should expect an average low temperature of -30°F.

Since the USDA zone info for Chippewa Falls is not always accurate the actual date of last frost changes from year to year. Half of the time in Chippewa Falls it frosts late in the year after May 15 so make sure that you are prepared to protect your osteospermum if you have a surprise late frost.

USDA Zone Info for Chippewa Falls

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

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

Plants to Grow in Chippewa Falls

You may be interested in your other planting guides for Chippewa Falls.