Before planting it is a good idea to find your USDA Zone info to figure out 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.

The best time to plant begonias in Zone 10a should be determined by reviewing the USDA zone info.

Planting Calendar for Begonias

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

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

The earliest that you can plant begonias in Zone 10a 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 begonias and expect a good harvest is probably September. If you wait any later than that and your begonias may not have a chance to fully mature. Starting your begonias indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost has passed is on January 31 in Zone 10a. It might get as low as 30°F during the coldest months of winter.

Since the USDA zone info for Zone 10a is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Zone 10a you get surprised by a frost after January 31 so make sure that you are prepared to protect your begonias if you have a surprise late frost.

USDA Zone Info for Zone 10a

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 Zone 10a

You may be interested in your other planting guides for Zone 10a.