Some of the hearts I've grown in containers (buckets): Zolotoy Korol, FishLake Oxheart and Kosovo, all very tasty.. FLO and Kosovo were a bit stingy perhaps, and suffered from occasional BER. I am not sure that any bigger container would have helped. All my tom plants grow in similar conditions (good organic soil, some fert pellets and composted horsemanure) and they tend to get large enough with enough trouble to try to keep them from falling over.