Show ELM TREES SHOULD BE HARDENED NOW pointing out that sib siberian ma i n e elm im trees suffer from early fall fr fross if kept green and jacu s jent too late in the fall horace andrews suggests that to prevent this loss of trees they should be hardened for winter frosts by the control of irrigation water during the fa fall season for utah watering should be discontinued early in september to allow trees to become sufficiently hardened for winter he explains albough al hough this applies mostly to th the e siberian elm mr andrews adds that in the higher sections of the state this is also a good safeguard against again st killing black locust walnut and green ash trees |