yellowing bottom leaves on rhododendron

Questionsyellowing bottom leaves on rhododendron
Dan McAuliffe Staff asked 14 years ago

I’ve 2 rhodendrums in pots side by side, one is perfect and healthy but on the other one over the past few weeks has slightly lost colour and it’s bottom leaves have gone yellow. They are well fertilized and seaweed extract added regularly. I’ve checked for grubs and there does’nt seem to be any present.