Hi my blueberry lvs have got very yellow, I've just noticed, despite them growing in pots. Can anyone recommend a pH meter - digital or strips of paper ?- whats the best for long term monitoring ?
I was going to apply ferrous sulphate as a foliar feed as a quick fix before going on hoiiday. I imagine in the long term I need better monitoring, and slower applictions of ferrous sulphate.
Amy advice appreciated.