In a former garden, I was given a blue geranium from a friend that seemed to become luminous for an hour or so before dusk. I don’t know whether it did this where it was positioned and how the light hit it, or if it was a known phenomenon of this particular plant.
Sadly, I didn’t manage to bring a clump to this garden so I’m looking again and hope someone might recognise what I’m looking for.
It didn’t flower for long or set seed, so I’m wondering if it could be Geranium x Magnificum? It’s definitely not Johnson’s Blue or Rozanne.