I have enquired with D. Henzler from Mack Agrar if he sees these multiple flowers as they do not work with foliars but only soil based approaches and the answer is that they see that very seldom. So I think that this condition will arise from changed mineral nutrition through foliars or constellation.

If you want to see really weird changes in plant architecture, have a look at the old weed research of the Thuns (“Unkraut”). There you see the effects of the application “weed peppers” of various potencies. It is incredible the way it interferes with the ordinary plan.