Posted: 06/02/2016 at 12:23
Christine, some are more vigorous than others so check on your packets' descriptions as to size, etc.
those tiny tubers, if started early, will make large or even very large plants by summer even in containers. Remember too they will make even bigger plants next year.
yes, a heavy pot if possible but at least use john innes compost....this adds weight, holds onto nutrients better and dries out less quickly. A top dressing of gravel too adds to the appearance
re cane supports, go for a tripod system and tie tops together. A single cane is rarely robust enough. You may have a dwarf variety or two that will not require supports