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 Cotati you can figure out when it's a good idea to plant ornamental grasses by referring to the USDA zone info.

Planting Calendar for Ornamental Grasses

Frost tolerance for ornamental grasses:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since ornamental grasses are barely cold tolerant you can plant them just a tiny bit earlier in the year than other frost tender plants.

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

Last Frost Date

The average date of last frost is February 15 in Cotati. You can expect an average low temperature of 25°F in the coldest months of winter.

Always keep in mind that USDA zone info for Cotati is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Cotati you get a frost after February 15 so just be sure to be ready to cover your ornamental grasses in the event of a surprise late frost.

USDA Zone Info for Cotati

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

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

Plants to Grow in Cotati

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