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

It's a good idea to figure out when it's a good idea to plant dahlias by checking out the USDA zone info for Mountain View.

Planting Calendar for Dahlias

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

Since dahlias are not cold tolerant it's necessary to wait until after the last frost before you can plant them.

The earliest that you can plant dahlias in Mountain View 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 dahlias and expect a good harvest is probably September. Any later than that and your dahlias may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your dahlias indoors.

Last Frost Date

On average the last frost is on January 31 in Mountain View. You can expect an average low temperature of 30°F in the coldest months of winter.

Since the USDA zone info for Mountain View may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Mountain View there is a last frost after January 31 so be sure to be ready to cover your dahlias in the event of a late frost.

USDA Zone Info for Mountain View

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Mountain View

You may be interested in your other planting guides for Mountain View.