I have this concorde pear for 4 years in my garden already and it never crop.First year it was full with flowers but finally no fruit and I assumed it was too young.The following year there was no flower and this year it put 4-5 flowers but I just realized they all fall without any fruit.

However the tree is growing very well and looks very healthy.I bought it as self-fertil tree but now I am wondering if this could be the cause???Any advice much appreciated..