Hi, This happened to mine in the first year, i hadnt too much of a clue about gardening back then but what i did do (it was not over a foot high) was give it a couple of Ericacious feeds through the summer. since read up a little about it and no - one tells you to do this, but my god , it worked!! why not try a weakend soulution, see if it gives it a lift?? fingers crossed Xx