Care1 Care for the Ceder tree fence Trim Cedar Hedges to Encourage GrowthIf you want your cedar hedge to grow full and even, be sure to trim it at the right time of year. By trimming new growth at the top of the plant in the spring, the growth hormones will be directed into existing areas, increasing the thickness in the summer.To promote root growth, you can trim your hedges in the late fall or early winter. As temperatures rise,.. 2024. 7. 30. prev 1 next