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When to Plant Ornamental Grasses in Rohnert Park, CA

One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of making a decision about when you can plant ornamental grasses is to check out the USDA zone info for Rohnert Park.


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 do ok in moderate cold you can plant them just a tiny bit earlier in the year than other plants that might not handle the cold.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant ornamental grasses
Possibly ok, but a risky time to plant ornamental grasses
Probably not a good time to plant ornamental grasses

The earliest that you can plant ornamental grasses in Rohnert Park 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. Any later than that and your ornamental grasses may not have a chance to really do well. You can get started a little bit earlier by starting your ornamental grasses indoors.

Last Frost Date

On average the last frost has passed is on February 15 in Rohnert Park. In the coldest months of winter you can expect an average low temperature of 25°F.

Since the USDA zone info for Rohnert Park is just an average the actual date of last frost will vary from year to year. Since half of the time in Rohnert Park you get surprised by a frost after February 15 be ready to cover your ornamental grasses in the event of one of those late frosts.

USDA Zone Info for Rohnert Park

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 Low25°F
Highest Expected Low30°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 Rohnert Park

You may be interested in your other planting guides for Rohnert Park.