So, we bought our current house last autumn, meaning I've never seen the plum tree in the back garden do it's thing. The previous owner told us it normally fruits very heavily (except for last year, which she put down to bad weather).
I'm trying my best to look after this tree but I think something is wrong with it. I put manure round the base in early spring and it now has lots of bright green smallish fruits on it. However... the biggest fruits are now starting to turn yellow/brown and look shrivelled and sad. We water it on hot days and the base of the tree is clear of weeds.
I've googled for ages and can't find this problem described anywhere. Is it supposed to do this? Can anyone help?? 