Hi, I could really use some expert advice on two Aganthus plants I bought last year for our patio. plants are roughly 80 cm. tall and I am happy that I was able to get them through the winter (mild winter, put in shed and wrapped in bubble wrap). Plants are healthy (new growth) however the containers I bought them in are not. The roots are causing the containers to burst so they need potting on.
I read that agapanthus likes its roots being restricted (won't flower if not restricted) and do not like rich soil. So do I pot them on already, or later in the year? and what type of compost should I be using.... The flowers are so nice I would not like risking not getting any this year.
Any help is appreciated.