I have kept a very healthy holly bush in a planter for 2 years. We have recently moved and I have noticed that a number of leaves are turning red around the edges and then falling off. Is it due to the move or extemely cold we have experienced? Please could you advise what I can do, as the tree has a very sentimental value to my family and we would hate to lose it.
Certified GKH Gardening Expert
I would check for pests, in particular mites. They will be very small and will be on the underside of the leaves. You may also see webbing and that is from the mites. This article will help with treatment: https://www.gardeningknowhow.com/plant-problems/pests/insects/spider-mite-treatment.htm