Why Is Agapanthus Not Flowering. Growing conditions If your agapanthus doesnt bloom it may be craving sunlight as agapanthus needs at least six hours per day. Be sure the soil drains well or the plant may rot.
Grow single plants in 20-23cm 8-9in in diameter containers using a loam-based compost such as John Innes No. Im going to cover each reason in detail. If this is their first year dont panic.
Im going to cover each reason in detail.
To encourage blooming use a 10-20-20 fertilizer 10 parts nitrogen by weight and 20 parts each of phosphorus and potassium. Most Agapanthus plants are winter hardy in zones 8-11 so in these climate zones the rhizomes can be left right in the ground. This explains why the bulb that you bought and planted doesnt flower at all in the first season often its simply too small. Agapanthus are hardy and vigorous outdoors but dont do so well in a container.