HELP Non flowering Hydrangea
Okay I have a hydrangea in a clients garden, a mophead, which has been pruned correctly, and sits in a bed with two other hydrangeas both mop heads, and planted in clay and the bed is mulched with bark. This one hydrangea will just not flower. The other two do, prolifically, but this one just will not produce a flower head and hasn't for the past few years. They don't get fed normally but this year I fed the non flowering one some tomato feed for several weeks. It's really healthy but no flowers. The client doesn't mind , but I do. Has anyone got any suggestions?