Delia O'Sullivan Staff asked 14 years ago
I bought two White Hydrangea last July. I transplanted both into larger containers earlier this year using John Innes Multi Purpose compost. Now the flowers are becoming reddish around the edges & the leaves also. Should I use John Innes Ericaceous compost? If yes, do I remove all the old compost from around the root ball? I would like to keep the Hydrangeas in containers for another while.