I just finished harvesting a late crop of heirloom tomatoes from my greenhouse (finished Nov 8). These were started in late June/early July for a late season harvest, and grown organically in a medium of soil, peat and manure - fertilized only with fish emulsion, seaweed extract, etc. Note, I am fairly north, so it's already pretty cold with shorter days up this way.

This was my first experiment with heirlooms in a greenhouse for a delayed season. I am looking for other growers who are growing heirloom tomatoes in a greenhouse so we can compare notes.