Hi there Rob,
No , not agapanthus but a NZ native which has white flowers and is not invasive. A type of Lilly almost like a day Lilly . Aggies have been a declared noxious weed and only smaller varieties are available from plant nurseries. Such a shame as a bank of them flowering away is a stunning sight.
But, as in Australia, so many imports thrive beyond expectations and become major pests.
With my house plants it seems the rule is......right plant right place.
Your garden looks to have recovered fully and will continue to provide you and your guests with calming restful pleasure again.
Thanks too for your thoughtful advice through this community centre. I sometimes wonder how you find the time and the patience.
cheers
Michelke