A young plant from the rough edge of a city garden where it has self-established.
From Wikipedia: Perhaps popularized by troops returning from the Second Boer War in Agapanthus's native range, surge of popularity in the early twentieth century. Agapanthus is often seen planted alongside fences in home gardens and framing driveway entrances. They also found lasting appeal at baches in New Zealand, for the extreme hardiness, salt-tolerance and very low maintenance. The plant has been listed on various weed registers since 1996, and is currently declared by the Department of Conservation to be an "environmental weed"