Yellowing leaves on skimmia
adamadamant
Posts: 264
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!!
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Looking at your photos.I think your S.Japonica is quite crowded and probably fighting for nutrients. A bit of pruning ( see link ) would let some air around the shrub. Also removal of any debris around the plant (i.e. dead leaves etc) .
A slow-release granular fertiliser for ericaceous plants may be better than a liquid. Try and work some ericaceous compost around the base of the plant as a mulch. This will benefit your S. fragrans too. The scorch on the leaf tip may be due to low temperatures.
Hope this helps you.
Stay safe.
https://www.rhs.org.uk/Plants/94155/Skimmia-japonica-Rubella-(m)/Details
https://www.gardenersworld.com/plants/skimmia-japonica-rubella/