When Is The Best Time To Prune Shrubs

and trees?

Plant pruning is most effective when plants are dormant. When plants are actively growing, the growth regulator hormones such as auxins and cytokinins build up in their stems and roots. These hormones can inhibit root growth at a critical stage of development which will result in an inability to absorb water and nutrients from the soil. Therefore, we recommend that you wait until spring or fall before pruning shrubs and trees for best results. Most gardeners don’t realize they must wait until after summer has passed before cutting back healthy new growth on hardy shrubs like rhododendrons or azaleas because this stimulates new leaf production which looks similar to winter damage caused by freeze-thaw cycles during winter months (Figure 2). Problems with blooms on Rhododendron’s usually occur around mid-summer when there is no longer enough time for these flowers to form before temperatures start dropping into autumn (Figures 3 & 4). For more details read: http://www.gardeningknowhow…. –