The USDA Zone info is a great tool for gardeners to help us figure out your gardening 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 figure out when it's the best time to plant arabis by using the USDA zone info for Gaithersburg.

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 means that you can start planting them much earlier than other plants that might not handle the cold.

The earliest that you can plant arabis in Gaithersburg 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 arabis and expect a good harvest is probably September. If you wait any later than that and your arabis may not have a chance to really do well. Starting your arabis indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Gaithersburg the average date of last frost happens on April 15. You can expect an average low temperature of 0°F in the coldest months of winter.

Keep in mind that USDA zone info for Gaithersburg is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Gaithersburg you get surprised by a frost after April 15 so be sure to be ready to cover your arabis in the event of a late frost.

USDA Zone Info for Gaithersburg

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Gaithersburg

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