Should add that I have never seen as many shrubs go like this in 40 years of growing things. Odd thing is that shrubs next to the chlorotic ones are normal healthy green leafed, even when from the same family.
Cheers. Now to find somewhere that sells Epsom Salts.
Never seen as many shrubs with yellowing leaves before. In fact only ever seen it in Camellias grown in limy soil.
Rose Zepherine Drouhin
To show but a few.
Anyone suggest a course of action?
Try Paeony tenuifolia, that has different leaves to the other Paeony species.
We can only grow them at the bottom end of the poly-tunnel where it gets very warm. Have grown them for a few years, but they definitely would not crop outside here, too cold.
They are possibly what is known as pot worms. They are harmless, in the same way as earthworms of the ruddy hue are.
Try adding some lime to your soil.
Biennial and the roots are edible. Let it seed if you want more.
And if you are really desperate the roots of Silverweed are supposed to be edible. But definitely don't take my word for that, look it up before trying!