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

One way of figuring out when it's a good idea to plant garden cress is to refer to the USDA zone info for Santa Rosa.

Planting Calendar for Garden cress

Frost tolerance for garden cress:	Not tolerant of frost.
When to plant:	After the last frost has passed.

You really shouldn't plant garden cress until after all chance of frost has passed because they require warm weather.

The earliest that you can plant garden cress in Santa Rosa is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant garden cress and expect a good harvest is probably September. If you wait any later than that and your garden cress may not have a chance to really do well. Starting your garden cress indoors is a great way to get them started a little bit earlier.

Last Frost Date

In Santa Rosa the average date of last frost happens on February 15. In the coldest months of winter you should expect an average low temperature of 25°F.

Since the USDA zone info for Santa Rosa is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Santa Rosa there is a last frost after February 15 so make sure that you are ready to cover your garden cress if you have a 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.