This week’s unseasonably warm weather across Iowa may trigger some plants to start peeking out of the ground early, thinking it’s spring. One expert says many flowering plants will be able to endure it, even if winter returns to surprise the young green chutes.Richard Jauron is a horticulturist at Iowa State University. He says many plants will simply stop growing if they’re covered with snow & start up again with the thaw.While some Iowans put straw or styrofoam covers over some of their tender plants last fall, Jauron says those coverings should be left in place until winter is gone for certain.Weekend highs are expected to be back in the 50s and 60s for much of the state, which is 20 to 30 degrees warmer than normal.