victoria plum tree help

hello
please can you help i`ve had a Victoria plum tree now for around 4/5 years
the last 2 years it has bared fruit
but when they get to the size of a apple seed they are all gone the next day !
something i think has eaten them but what ?
the plum tree is in a huge pot and the tree has had something done to its roots
so it does grow huge !
thank you Paul

 

Several things Paul. how often is it watered, how often is it fed and what do you mean it has had something done to it`s roots? Also, when you grow something in a container you are automatically bonsaing it, that is, keeping it smaller than it would be in the open garden.

 

@paul777
A photo would be handy.
At what time of year do the fruit fall off, and what colour are they when they fall off?
I suspect pollination could be an issue, although Victoria is supposed to be self fertile it benefits from having another plum around.

 

hi all thanks for replays
i bought the tree what are suitable for pots it will not grow to big
water and feed often the fruit still green well no sign of it
hence i think something was of been hungry my sister thinks its birds
as i do have bird feeders close by !
its Self-fertile when i bought it cant remember the root system just know they are for large tubs
thanks paul