Why are the leaves on my Canna Lilies brown edged, brown spots?
Leaves curl at edges and are brown.
Certified GKH Gardening Expert
If they're flowering, they may have reached or are near the end of their cycle. They could also be getting too much sunlight or have a watering issue. For additional reasons for browning in the leaves, this article should help: https://www.gardeningknowhow.com/plant-problems/environmental/what-causes-brown-edges-on-leaves-of-plant.htm