I have 2 palms in the pagola and find that the fronds leave green oily residue on furniture and walls. What is causing it and how can I prevent it?
Certified GKH Gardening Expert
This sap is likely caused by scale on the palm. This article will give you information on how to control this: https://www.gardeningknowhow.com/houseplants/palms/sticky-palm-tree-leaves-treatment-for-palm-scale.htm