HAve you checked the Canna website for a weekly feeding schedule?

On occation, I've seen those that were going into flower, get a shot of growth nutes the day of final transplant and switching, where they also get flowering nutrients. (Overdosing) Sure you didn't spray or spill something on it?

Anyway, that one leaf indicates to me a severe overdosing. Would be nice to see the whole plant, and have ya fill-out the troubleshooting form if they don't improve quickly, but that's the best I can offer without more...
Rusty Trichome Reviewed by Rusty Trichome on . Tristans Sick Blueberries!! Hey guys.. Few probs! Basically i have had a few of my plants flipping out. Im sure its because i did a straight water feed with some terribly off PH levels. I am getting a few difference deficiencies from what i can see but really im no professional what SOEVER lol I have two 600w lights, adequate ventilation. Using the canna range within their recommended dosage levels. I think im seeing potassium problems but ive been feeding well. im thinking PH shock causing deficiencies.. Well Rating: 5