I used Epsom salts, diluted as recommended for yellowing camellia leaves, & also on magnolias, rhododendrons & roses.I have clay based soil, gets dry. I was pleased to see the camellias etc gradually green up ( acid plant feed hasn't helped) & my pink magnolia Stellata has produced the deepest pink ever this Spring.It was very pale pink before. I think it's worth stressing that E salts needs to be properly diluted as advised by pro gardeners (in UK), & not used as dry powder.
I used Epsom salts, diluted as recommended for yellowing camellia leaves, & also on magnolias, rhododendrons & roses.I have clay based soil, gets dry. I was pleased to see the camellias etc gradually green up ( acid plant feed hasn't helped) & my pink magnolia Stellata has produced the deepest pink ever this Spring.It was very pale pink before. I think it's worth stressing that E salts needs to be properly diluted as advised by pro gardeners (in UK), & not used as dry powder.