Agapanthus not flowering

Agapanthus flowering will often reduce over time as the plants become increasingly clumped. So, If this is the cas, I would recommend thinning them out a bit. Also, if they are in a shady location, not enough sunlight can affect flowering. Lastly, I would recommend giving them a fertilise with a Potassium based fertiliser – potassium is essential for flowering.

Hope this helps 🙂