I have a segregated area on my Allotment which is completely covered with bird netting that contains black, red and white current and gooseberries plants. It also has a thornless blackberry bush (not sure of the variety I’m afraid) on one side, which is producing a huge crop of really big, sweet and succulent blackberries this year.
My problem is that the upper support timber for one side of this area has rotted and collapsed in the past and has not been replaced. This is the side where the blackberry is growing and consequently the plant has grown through the bird netting… A repair to the area is possible, but I would need to cut a fair amount of the blackberry away to free it from the netting, which I want to keep intact to stop the birds.
My question is – How much can I safely cut away without permanently damaging this very healthy plant?