Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In San Dimas you can figure out when to plant borage by reviewing the USDA zone info.

Planting Calendar for Borage

Frost tolerance for borage:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

You can plant borage a little earlier in the year because they are moderately cold tolerant.

The earliest that you can plant borage in San Dimas is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant borage and expect a good harvest is probably October. Any later than that and your borage may not have a chance to fully mature. If you are starting your borage indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In San Dimas the average date of last frost happens on January 31. You can expect an average low temperature of 30°F in the coldest months of winter.

Just be sure to remember that USDA zone info for San Dimas is an average and the actual date of last frost changes from year to year. Half of the time in San Dimas there is a last frost after January 31 so just be sure to be ready to cover your borage if you have a late frost.

USDA Zone Info for San Dimas

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 San Dimas

You may be interested in your other planting guides for San Dimas.