paulie
ArboristSite Lurker
My 25-foot high, 12-14 inch diameter, fruitless mulberry has a pit hole in the crotch, about 8 feet above the ground. It fills with water and muck to a depth of 6-7 inches. I flushed it with a hose. Now that it is clean and dry, I can see no damage to the bark, which looks fine all the way to the bottom. The pit is conical shape. Is this condition harmful to the tree? If so, what should be done? Last year, an arborist suggested drilling a drain hole. Is such invasive surgery warranted?