I have a salix x sepulcralis chrysocoma in a large planter. A couple of
months ago it was affected by scale, which I manageed to treat scucessfully,
now it has another problem. Almost half the leaves have gone very dry and
curled up, some have started falling, it's happened very quickly, in the
past 4 or 5 days.

It's planted in potting compost with pearlite, gets plenty of water and a
regular feed. I have other ordinary willows in pots which are all doing
fine. I am wondering if I am doing something wrong, or if I have just bought
a dud tree.

Any advice would be much appreciated.

Earnest Trawler