Why does my agapanthus have small black spots and yellow leaves
Leaves shrival and die back to healthy blubs, come up healthy again next year when it starts over again. What is causing it?
It does sound like the area where you have planted your agapanthus may be too wet if the leaves are yellowing and suffering with fungal spots. You may need to check the drainage and improve it and also ensure that the plants received at least 6 hours of sunlight per day.
Answered: 7 Dec, 2018