I want to know how you can start poplar trees from prunings. I have tried cutting a limb and putting it in water with root stimulator with no results. The water goes sour and the tree does nothing. I have had good results with willows, but can't seem to get the poplar to take.
Certified GKH Gardening Expert
You cannot root poplars this way. However, you may be successful with rooting cuttings. This article will help: https://www.gardeningknowhow.com/ornamental/trees/tgen/how-to-root-cuttings-from-various-shrubs-bushes-and-trees.htm