Asked April 30, 2024, 4:07 PM EDT
Hi-- I planted five big leaf (Endless Summer) hydrangeas in front of my house in 2021. The area they are planted in admittedly is right against my house, surrounded on all sides by sidewalk/house/driveway and probably does not have the best drainage. The shrubs started out ok, but over the past two seasons they developed bad leaf spots, many leaves fell off and they did not flower well. I suspected that I had planted them too close together with poor drainage and too little airflow given they were planted against my house, so I decided to move the plants last fall. I transplanted them all to different locations in my yard and so far, they appear to be growing well and I haven't noticed any spots. I should also add I have three of the same hydrangeas on the opposite side of my porch that are thriving, but they are planted on a slope and get more shade, so I'm guessing they are just planted in a more ideal location. (In the attached photo of the house the infected hydrangeas are planted to the right)
I decided to replace the hydrangeas with new ones this spring and I tried to amend the soil with compost and perlite and added extra garden soil. We also applied new mulch shortly after they were planted. I noticed that the same spots are appearing on the new hydrangeas.
My questions are:
-What is causing the spots?
-How can I treat them if even possible?
-Is the problem something having to do with the soil or location? Would you assume that any plant I put in that spot will be susceptible to the same problem?
-Is there a shrub or plant you could recommend for that particular planting location?
I've attached a photo showing the original hydrangeas last fall before I moved them, a photo of the new hydrangeas that are beginning to get spots as well as a photo of the flower bed where the hydrangeas are planted.
Thank you so much for any insight you have!
Kate
Montgomery County Maryland