Originally Posted by aruzinsky

No GA on those cannas, 'Bethany' and 'B. Marley' but I tried 25 ppm GA on C. 'Pink Sunburst' while planted outdoors in the summer of 2016. It made the petioles so long that they collapsed under their own weight and there was no increase in leaf area although the leaves were longer. Incidentally, here is a photo of that plot:


C. 'Pink Sunburst' are the ones with pink flowers but you can't see the GA treated ones because they are in the back.