Q.Can I root a crepe myrtle cutting in water alone
I have cuttings from my crepe myrtle and I am trying to root them can it be done by placing the cuttings in a jar of water?

Certified GKH Gardening Expert
This method will be much more trouble than it is worth. This can work for cuttings that will normally root within a week, but anything longer than this will require quite a bit of care to keep alive to allow for rooting. There is a much more efficient way to take cuttings and ensure that they survive.
This article will help: https://www.gardeningknowhow.com/ornamental/trees/crepe-myrtle/how-to-propagate-crepe-myrtle-trees.htm