Can anyone tell me what is wrong with grevilleas which have dying
branches? Situated on the north shore of sydney on a well drained
position.

A Westringia nearby is also starting to die off?

What is the problem and what to do about it?

Thanks,

Jan

if the branches are grey/black and have a slightly fuzzy look about them the
problem is likely scale, which is not uncommon in winter chemspray make a
product called antiscale, available at bunnings etc it is a bit of
maldison mixed with white oil i believe or just use white oil at about
20-25ml per litre make sure you spray all branches thoroughly on all
surfaces repeat weekly for two or three weeks then fortnightly for
another couple of times works for me