Pella tied a record low temperature of 36 degrees overnight Thursday, but readings like those aren’t all bad news for plants that have been in the ground for awhile. Sherryl Nunnikhoven with Dutch Meadows Gardening in Pella says the plants most susceptible to temperature swings like these are ones that have been recently taken from a greenhouse and planted outside. She says there are a few specific kinds of plants to take extra care with. She says if you’re worried there will be frost, it’s ok to drape a light sheet over plants or put them in a garage overnight. Nunnikhoven says that if any plants were damaged by frost, they will take a few days before showing signs of damage.