Q.Are Sticky Blossom Casings Normal For The Horse Chestnut?
As the blooms come out my large horse chestnut tree drops a big load of sticky blossom casings. Is this normal, or is there something wrong with the tree?
Certified GKH Gardening Expert
Unfortunately, your photos did not come through. I am unable to see the issue in question.
Depending on the severity of the stickiness, it could be normal sap release, or it could be insect pest related.
In the meantime, this article will help you with the care of the tree: