DanDanDan: I'm not an expert either, but firstly are they the fruiting cheery type not flowering cherries. I haven't had to prune mine but it's only 2 years old. Last year we only got a dozen or so cherries but it's laden this year. Also could be the variety might need a pollinator, Hope this helps.
(Cacher) Si vous souhaitez saluer quelqu'un dans sa langue natale, essayez notre Dictionnaire du Joueur, par le lien "au sujet des langues" sous les drapeaux. (pauloaguia) (Montrer toutes les astuces)