customer has a problem with trees and shrubs, actually falling over, roots and all. in the fall, after a bad wind storm, she asked if i would stake up a huge white pine that had fallen over. i looked, and there were no roots, the root system seemed to stop developing, i imagine there was more to it when it was first put in. now, the tree itself looked healthy and strong, needles intact, limbs healthy, but no roots, it just fell right over. she called today, and said now many trees, and even small shrubbery(azealeas, rhodes, hollies) have fallen in the same manner. we had lots of snow this year, more than usual, and this last one was very wet and heavy, i think that caused the tipping, but why the shallow rooting? one thing i noticed in the fall, was all her planting beds have weed barrier, or plastic, with mulch on top of it. i told her of the hazards, she didn't want to hear it, saying it's been that way for years. any ideas?