I just planted a couple of hydrangeas a few weeks ago. I used some potting soil and have mulch around the base. There is new growth on them but shortly after planting several of the leaves started turning a dark reddish color and some have fallen off. I have looked into the soil and it seems moist. We've had a fair amount of rain in the area these past few weeks (during which times I have turned off my sprinklers to avoid over watering). We have also had moderate temps (lows in the 50s and highs in the 60s-70s for the most part). They are planted on the west side of our home and so they get afternoon sun. Any ideas? I know there are a million posts about discolored hydrangea leaves out there but I know there are several possibilities as to why.
Thank you for you input!