I started a lot of canna's from seed that I got on the seed exchange this year. All of them germinated, and are now blooming :-) (great excitement). However, as the seeds were all mixed in, the canna that are growing are all mixed up too. I have one yellow, several pink, an orange and some red. Some are short, some are medium height, and some are tall. My question is this: is the size that my canna are now the size they will stay? Will the small be small and the medium be medium next year, or will they get bigger as they mature? I am just wondering so that I know where to plant them (according to height) next year. Thanks!