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 osteospermum is to examine the USDA zone info for Sheffield Lake.

Planting Calendar for Osteospermum

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

Osteospermum are moderately cold tolerant which tells us that you can plant them a little bit earlier than other plants that might not handle the cold.

The earliest that you can plant osteospermum in Sheffield Lake 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 osteospermum and expect a good harvest is probably September. If you wait any later than that and your osteospermum may not have a chance to grow to maturity. Starting your osteospermum indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Sheffield Lake. In the coldest months of winter you should expect an average low temperature of -10°F.

Since the USDA zone info for Sheffield Lake is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Sheffield Lake it frosts late in the year after April 15 so be sure to be ready to cover your osteospermum in the event of one of those late frosts.

USDA Zone Info for Sheffield Lake

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Sheffield Lake

You may be interested in your other planting guides for Sheffield Lake.