I want to move my Annabelle Hydrangea to another part of my garden. When would be the best time to do it?
I would put it off until fall if at all possible, or wait until next spring. However, as long as the plant is properly acclimated beforehand and the temps are not too hot/cold, you can still go ahead and move your hydrangea now. Be sure to place it in a suitable location and give it plenty of water deeply until the plant re-establishes itself. Also, make sure to get up as much of the roots and surrounding soil with it. You may want to prune it back some too so that the plant focuses on root growth rather than foliage/blooms.