PORTLAND -- The National Weather Service issued a freeze warning for the Columbia River Gorge through Wednesday morning.

Clearing skies and cold, dry air were expected to bring freezing temperatures as low as 20 degrees to areas surrounding the eastern Columbia River Gorge, including The Dalles, Arlington, Heppner, Yakima and the Tri-Cities Tuesday night and Wednesday morning.

Portland should get down to around 38 degrees Tuesday night, according to KGW meteorologist Nick Allard. Hillsboro and surrounding areas could see temps drop to 32 degrees.

Portland's streak of dry days ended at 12 over the weekend, according to KGW Meteorologist Rod Hill.

Read:Rod Hill's Weather Blog

The cold temperatures concerned some gardeners, who prepared their crops for the potential freeze. Local gardening experts recommended covering outdoor crops with a one or two-inch layer of mulch or protecting them with landscape fabric.

For some plants, however, moving them is the only guaranteed way to protect them.

Anything like citrus, you would definitely want to move inside, said Andy Benneth of Al's Garden Center. Anything in containers that are a little bit tender, just slightly moving them closer to your house or garage is going to be better than leaving them out in your landscape.

But, Benneth said, one night of frost won't usually cause serious harm to plants. Gardeners should just make sure to protect their crops before they are exposed to multiple freezing days in a row.

More: Latest Forecast

Also: 7 Day Forecast

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