Posted: 14/08/2013 at 15:39
I don't think you are jumping the gun as such, Agapanthus can be a little fickle ( in my experience). Have you planted it in the ground or in a pot ? and somewhere nice and sunny ?
Agapanthus are renowned for liking to be quite restricted in growth and were grown in terracotta pots for several years before needing to be repotted ( often needing the pot to be smashed to get the plant out)
I would hold off trying to propagate / divide the plants as you will delay flowering for even longer.
If i were you when you receive your new plants pot all three of them into quite a large pot if possible ( depends on the size of the plants i guess) really cram them in and use quite a free draining compost mix ie quite gritty.
After a few weeks give them a few feeds of over the course of a few weeks of high potash food like tomato food to encourage strong roots and flowers next year
You should get a few years of really good flowering and when the plants are basically trying to escape from the pot then it is time to divide them.
Hope this is helpful