Curious what everyone is using for fertilizer on their established Chestnut trees. Out of all the dead trees I've had due to drought I do have a few that have survived and are doing well. Some are going on their fourth year now and are over 7' tall. I haven't been giving them any fertilizer and thought I would start this year. First thing that comes to mind is just some good old composted cow manure (which we have a lot of) but not sure how well it would work being applied on top of the soil. We usually work it into the soil in our vegetable gardens. I also have access to chicken manure but you have to be careful with that stuff. Not opposed to chemical fertilizers either just not sure what to apply and how much as I don't want to set my trees back. I'm aware of the Miracle Grow Orchid fertilizer which I use on my seedlings.