I've had a couple consultations with the local ISA arborists in conjunction with getting some deadwooding and other work done, and it was suggested that a couple of my oaks (2 Red, 1 White) would benefit from a few hundred gallons of soil drench fertilization owing to the ongoing struggles of having large trees (30"+DBH) in really tight spaces with soil compaction issues.
What would they using as a fertilizer (components or brand name)? Any suggestions on a DIY solution?
What would they using as a fertilizer (components or brand name)? Any suggestions on a DIY solution?