One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Petaluma you can figure out when it's a good idea to plant dahlberg daisy by checking out the USDA zone info.

Planting Calendar for Dahlberg Daisy

Frost tolerance for dahlberg daisy:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since dahlberg daisy do not do well in cold weather it's necessary to wait until after the last frost before you can plant them.

The earliest that you can plant dahlberg daisy in Petaluma 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 dahlberg daisy and expect a good harvest is probably September. You probably don't want to wait any later than that or else your dahlberg daisy may not have a chance to fully mature. Starting your dahlberg daisy indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average all chance of frost has passed is on February 15 in Petaluma. You should expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for Petaluma is an average the actual date of last frost changes from year to year. Half of the time in Petaluma you get a frost after February 15 so just be sure to be ready to protect your dahlberg daisy if you have one of those late frosts.

USDA Zone Info for Petaluma

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 Petaluma

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