Q.What Is Eating My Canna And How To Stop It
Please see images- I have tried slug pellets and can’t see any caterpillars/obvious culprits
Certified GKH Gardening Expert
I would suspect issues, such as Canna Rust, or pests such as slugs and snails. Here are some articles that will help explain how to remedy some of these issues:
https://www.gardeningknowhow.com/ornamental/bulbs/canna/treating-rust-on-canna-leaves.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/kill-garden-slugs.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/organic-snail-control.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/using-bacillus-thuringiensis.htm
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm