Curiosities: Are winter warm spells ? followed by legit winter weather ? going to harm plants?

A: It depends on the plants, but probably not, said Laura Jull, associate professor of horticulture at UW?Madison.”I?m confident that trees and shrubs will be OK,” Jull said. “But I?m seeing in my own yard daffodils and tulips coming up, and that?s not good.”