Why has my Agapanthus stopped flowering?

[Orangeanddemons]

It's very verdant and green, but about 2 years ago stopped flowering and I don't know why.

I do remember dh once decided to tidy the garden about the same time and attacked it

[echt]

I've looked this up and, unsurprisingly ags like to be crowded but not too crowded, divided, but then ooh, they sulk. They are buggers.

I despair. I live in Australia and follow the apparent rule which is to treat them like a piece of crap, chop their roots in half, stuff them in the round, pile in the soil, water and walk away. I swear I saw this done at my school and there they are, all blooming.

< This had better work for me, having hacked up a circle of ags into 12 plantings. Will post if they come up trumps.>

[Purplewithred]

Is it in the ground or in a pot? If its in the ground it's probably just happily bulking up and doesn't feel the need to flower yet. Try a feed designed to make stuff fruit/flower, i.e. tomato food.

[MaudantWit]

Oh. This makes me fear that my biggest pot of agapanthus, which has yet to produce any flower stems, is overly pot-bound. Drat.

As always, the RHS has good advice.

[EmNetta]

Mine was moved from a pot to the border, and am still waiting (about 4 years later) for more than 6-7 blooms. I fed this (and rose) with old coffee-grounds during the winter, which has made huge difference and should be a good show this year.