The USDA Zone info is a great tool for gardeners to help us estimate your gardening 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 estimate when it's a good idea to plant artichokes by using the USDA zone info for Santa Rosa.

Planting Calendar for Artichokes

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

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

The earliest that you can plant artichokes in Santa Rosa 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 artichokes and expect a good harvest is probably October. Any later than that and your artichokes may not have a chance to really do well. If you are starting your artichokes 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 Santa Rosa. In the coldest months of winter you can expect an average low temperature of 25°F.

Since the USDA zone info for Santa Rosa may not be accurate from year to year the actual date of last frost is different every year. Half of the time in Santa Rosa you get a frost after February 15 so just be sure to be ready to cover your artichokes if you have a surprise late frost.

USDA Zone Info for Santa Rosa

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 Santa Rosa

You may be interested in your other planting guides for Santa Rosa.