Mine are three years old and are blooming now for the first time. I hope they go all summer! I think I'm going to move them to a slightly sunnier spot this fall.
GAmud

I misread the thread title as "Acanthus Blooms". I do not have Agapanthus.
GAmud

i have two buds out of 10 plants. I have had them for a year but they are newly transplanted.

Mine only bloom once. I keep them pot bound and in a green house for the winter. They normally start blooming before the last frost and are blooming when moving them outside in the Spring.

One is blooming now and the others have buds.

The ones in the ground are not killed but have never bloomed.

I need to correct the previous post. One that is in the ground has a bud this year.