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.

It's a good idea to determine when you can plant dahlias by looking at the USDA zone info for Arroyo Grande.

Planting Calendar for Dahlias

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

Since dahlias are not cold tolerant it's necessary to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant dahlias in Arroyo Grande 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 dahlias and expect a good harvest is probably September. You probably don't want to wait any later than that or else your dahlias may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your dahlias indoors.

Last Frost Date

On average the last frost is on February 15 in Arroyo Grande. You can expect an average low temperature of 25°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Arroyo Grande is an average and the actual date of last frost changes from year to year. Half of the time in Arroyo Grande you get surprised by a frost after February 15 so just be sure to be ready to protect your dahlias if you have a late frost.

USDA Zone Info for Arroyo Grande

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 Arroyo Grande

You may be interested in your other planting guides for Arroyo Grande.