Greengage (probably) Rotting on Branches?
I've recently moved house and come into posession of my first ever garden. I'm very excited! The previous owners told me there was a plum tree so I'd been waiting to see whether it fruits this year... and it did. However, most of the plums have been rotting on the branches before I've got to them, and the flies and wasps are at them now.
Anyone know if this is a problem, and if so how to fix it? Admittedly I was waiting for them to turn a different plum-y colour before picking, but if they're greengages then maybe I just left it too late?
I'm a complete beginner, but haven't managed to find much about this through googling - everywhere tells you about harvesting plums, but not what happens afterwards if you leave them on the tree! Feel free to tell me 'this is just what plums do, silly' if that's the case.
Hope someone has some ideas. Thanks!