Posted: 19/01/2018 at 10:18
If you plant two or more of the same apple or pear trees they will not cross pollinate, the trees will carry the same pollen (putting it very simply) you will need two apples or pears of different varieties which blossom at the same time or just overlap.
Also if they are likely to get hit by late frost go for fruit trees which blossom later, a good garden centre should be able to give you some advice.
To make the best out of your space you could plant apple and pears growing as cordons not espalier, they take up less space so you can get more varieties in.
Good work so far, well done .