A long time favourite of ornamental urban tree design, prunus trees are beloved for their compact size, beautiful foliage, and low maintenance… but that’s unfortunately no longer the case for this troubled tree species. the reason: black knot fungus.
Yes, the dreaded black knot. An incurable and prolific tree fungus; black knot lives inside the wood of the tree and spreads through the air with spores released from unsightly black growths on the branch ends.
Being by far the most common tree disease we come across in Edmonton, any species susceptible to the disease should be avoided.