One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Tustin you can estimate when it's the best time to plant arabis by reviewing the USDA zone info.

Planting Calendar for Arabis

Frost tolerance for arabis:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Arabis do ok in a bit of cold which means that you can plant them much earlier in the year than other plants that might not handle the cold.

The earliest that you can plant arabis in Tustin 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 arabis and expect a good harvest is probably October. Any later than that and your arabis may not have a chance to fully mature. You can get started a few weeks earlier by starting your arabis indoors.

Last Frost Date

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

It's important to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Tustin and it can change quite a bit from year to year. Half of the time in Tustin you get a frost after January 31 so make sure that you are ready to protect your arabis in the event of a surprise late frost.

USDA Zone Info for Tustin

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 Tustin

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