Wall o' Water and similar products protect young plants down to at least 28 degrees. Some people leave the "teepees" on all season. I don't. I take mine off once the plant grows up and out of the top.

Probably the best protector from cold temperatures (16 degree to 10 degrees) for an individual plant is the Wall O’ Water. It has 18 plastic tubes that are 18 inches tall. The tubes are filled ...

Please look at the time stamp on the story to see when it was last updated. Trela Phelps from City Floral shows us Wall-O-Water Tomato Protectors.