I got some Canna bulbs/tubers from my local composting site last Fall, and potted them up. Woo Hoo! They are growing! My question is...is there any way to guess what color they might be before they bloom? Some of them have a red line at the top of the kind-of collar leaf thingie at the base of the plants. Also, some are already two feet tall...how big will they get? Anything that you can help me with would be appreciated greatly. I have always wanted Cannas, but have never been able to afford them. Oooh, I'm so excited!!!