Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to determine when it's possible to plant osteospermum by looking at the USDA zone info for Willits.

Planting Calendar for Osteospermum

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

You can plant osteospermum a bit earlier in the year because they do well in moderate cold.

The earliest that you can plant osteospermum in Willits 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 osteospermum and expect a good harvest is probably October. You probably don't want to wait any later than that or else your osteospermum may not have a chance to really do well. If you are starting your osteospermum indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is February 15 in Willits. It might get as low as 20°F during the coldest months of winter.

Since the USDA zone info for Willits is just an average the actual date of last frost will vary from year to year. Since half of the time in Willits last frost occurs after February 15 be ready to cover your osteospermum in the event of one of those late frosts.

USDA Zone Info for Willits

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 Willits

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