Hi, it looks as though it has been short of water, unless there is damage to the base of the shoots, or it could be something damaging the roots, I know august was pretty cold, but not cold enough to cause this, I would check over the plant, looking for anything out of the ordinary, such as infestation by something, damage to roots or shoots, and check how dry the soil is about 8 or 9 inches down, Derek.

Thanks for the advice Derek I will check it out tomorrow.