agapanthus - potted ... previously vigorous now struggling
I have 2 large pots of peter pans, about 7 years old, bloomed prolifically until last summer. now 1 looks good with many buds and lots of healthy roots at edges of pot. The other has leaves which have become half size, no visible roots, and 1 very weak bud! Both pots were equally crowded,ie pot -bound, Could I have over done it? over watered it [leaves are pretty green]? I don't see any signs of fungus, disease etc. the difference this season between the 2 pots is dramatic! any suggestions?