Answer: It doesn't sound as though your Agapanthus is thriving in its present location in your garden. Stunted or deformed growth indicates a problem with the roots or soil, or some kind of damage to the crown of the plant. I think it would be worth the effort to dig it up and either amend the soil before replanting, or move it to a different spot in your garden. Agapanthus prospers in full sun or afternoon shade, and will grow in either moist or or slightly dry soils. After replanting your agapanthus, try watering deeply only once every week or two during the growing season to see if less water makes a difference in its growth and ability to bloom. Withhold fertilizer for the time being. Too much nitrogen fertilizer can prompt lush, green growth, at the expense of flowers.
Best wishes with your agapanthus!
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