Keith's lemon. I grow Durban, Pretoria, and a couple the names of which I forget. They need long growing period. Best overwintered under glass either potted or not but potted up in early spring anyway. Then water well, feed and plant out after frost has gone. The tatty leaves are prob snails. The weather has been unkind to cannas....I think they're from south Africa. If you intend to grow in a pot get biggest possible. In the garden they grow huge.....here for me anyway. My variegated green/white yellow flowered one occupies space 6' x 6' and 7' high with dozen or more spikes yet this was split 2 years ago.