Yellowing leaves on skimmia
I have an area in my garden near a large conifer that has three long-established skimmia - two Skimmia fragrans (or at least they are the one with the white flowerheads) and one Skimmia japonica. Two of them, the japonica and one of the fragrans, are ailing badly, with yellowing leaves, and some leaf loss. I have some ericacious feed which you dilute and water on, which I've used as at the moment I cant seem to get sulphur which I gather is good for correcting the ph of the soil. Am I on the right track? Also this is a question I have no idea about, if I manage to regulate the ph (if indeed that is the problem) will the yellow leaves return to glossy green, or do I need to wait for new growth? Some branches are actually dead and I will cut those out, but alot of the japonica is affected, and the fragrans just looks really unhealthy with the leaf loss. PS I also have a new daphne odora which is showing similar signs - very, very poor new growth and yellowing leaves, although this is further down the garden. Help!!