Q.How do I attract moths to my catalpa trees?
I have several catalpa trees but have never had any worms. I am a fisherman and would love to use them for bait. I transplanted these trees four years ago and always had worms in the past at their previous location.
Certified GKH Gardening Expert
They will be naturally attracted to the tree. There won't be much that you can do to attract them. All you can do is make sure the tree remains healthy. You may consider planting more trees, but I would have care with this. They can become quite invasive.
This article will help you to care for the tree: https://www.gardeningknowhow.com/ornamental/trees/catalpa/catalpa-tree-planting.htm