It's Autumn Anyway

Autumn has arrived and my beloved geraniums (pelargonium) still look great:



At a first glance maybe - it's rather shocking, if you take a closer look:



I've consulted many experts in the kingdom Plantae (swim teacher, brother & father) and they all said that:

1. it's a fungus
2. it has propagated too far to do anything
3. it's autumn anyway.

I did not expect autumn to arrive that quick.