What to do about split in trunk of autumn purple ash?
Hi, everyone. We have an autumn purple ash about five years old and 4-inch trunk diameter which has a vertical split in its trunk about a foot long and a quarter inch or so deep. What should we do about this, if anything? The tree seems healthy otherwise. We're now re-doing the messed-up drip irrigation in our entire yard; the ash will now be getting about 40 gallons at the dripline three times a month. I'm not sure what it got before, but it didn't have irrigation around the dripline.
A maple near the ash also has multiple splits in its bark, but they aren't deep at all.
Thanks very much for any advice you can offer.