NO blossom on Katy apple tree
I planted my apple in tree autumn 2016. Spring 2017 was a bit like this one where it turned cold and then warm again. Noticed it developed long upright branches but with sections of stem with no leaves. It still blossoms with a few apples. This year, no blossom and still the gaps where there are no leaves. What's wrong? Should I prune? Treat with fertiliser? It does seem to have mostly upright branches with no side branches. My Cox tree has blossomed okay.