The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Westminster should be read to determine when you can plant arabis.

Planting Calendar for Arabis

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

Arabis do well in cold which tells us that you can start planting them much earlier than more sensitive plants.

The earliest that you can plant arabis in Westminster 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. If you are starting your arabis indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Westminster the average date of last frost happens on January 31. It might get as low as 35°F during the coldest months of winter.

Since the USDA zone info for Westminster may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Westminster you get a frost after January 31 so make sure that you are ready to cover your arabis if you have a late frost.

USDA Zone Info for Westminster

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in Westminster

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