The USDA Zone info is a great tool for gardeners to help us figure out 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 the best time to plant dahlberg daisy by referring to the USDA zone info for Napa.

Planting Calendar for Dahlberg Daisy

Frost tolerance for dahlberg daisy:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

It's probably a bad idea to plant dahlberg daisy until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant dahlberg daisy in Napa 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. Any later than that and your dahlberg daisy may not have a chance to really do well. Starting your dahlberg daisy indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Since the USDA zone info for Napa is just an average the actual date of last frost is different every year. Since half of the time in Napa it frosts late in the year after February 15 be ready to protect your dahlberg daisy if you have a surprise late frost.

USDA Zone Info for Napa

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 Napa

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