The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Upper Sandusky you can estimate when it's a good idea to plant osteospermum by looking at the USDA zone info.

Planting Calendar for Osteospermum

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

Osteospermum do well in moderate cold which means that you can plant them earlier than more sensitive plants.

The earliest that you can plant osteospermum in Upper Sandusky 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 really do well. 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 Upper Sandusky. In the coldest months of winter you should expect an average low temperature of -10°F.

Always keep in mind that USDA zone info for Upper Sandusky is not always accurate and the actual date of last frost is different every year. Half of the time in Upper Sandusky there is a last frost after April 15 so make sure that you are prepared to cover your osteospermum in the event of a surprise late frost.

USDA Zone Info for Upper Sandusky

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 Upper Sandusky

You may be interested in your other planting guides for Upper Sandusky.