When I prepared those planters, they were almost empty, set in place, filled with planter soil, and plant added last. Bruce (Superman) moved them into the neighbor’s yard so he could scrub and wax the south side of my trailer home. As I understand their procedure: Scrub, scrape, caulk, repair, wax, etc., etc, on the roof. Lower area gets a thorough cleaning and waxing, too!! Who am I to question? They can do “their thing” and I’ll continue to take pictures and prepare blog messages.
Even super men have their limits!! “Real Feel” is 107 degrees so time to head for home.