Posted: 11/07/2013 at 17:30
I have an apricot in a 50cm pot which I planted last autumn. It was covered in blossoms, but unfortunately the lousy spring didn't bring any bees or other insects to pollinate them and I forgot to do it by hand, so only have 2 apricots. Hope to get more next year.
I think a 15" pot is way too small and not watering enough doesn't help either. Try replanting them in bigger pots in a mixture of John Innes 3 and some garden soil (mole heaps would be great if you have any nearby). I think you just have to give them time to establish themselves properly.