I've been growing some in pots for a few years and agree the leaves look gorgeous really lovely looking plants. I’ve read these can be overwintered in the house. They are surely attractive enough, although I’ve never got around to it.
Mine were labelled Eddoe in the supermarket and sound similar to yours as these are the smaller tuber types not the big football ones. I’ve found they do well either in the polytunnel or greenhouse, grown in large pots (12-15 litre) in multi-purpose compost. They are really easy plants, I water well when compost has started to dry, I’ve not noted any problems with pests. Mine usually end up under the benches and they seem too do well in this semi shady spot.
Remarkably they survived last winter freezing temperatures in an unheated greenhouse. Though I think this was more luck than judgement as I was sure I would have lost them. Generally they do seem to overwinter well as long as the compost is kept dry. They soon start to sprout in spring once the weather and light improves.
Numbers of underground tubers increase over the season, though these can be a bit small and may need another seasons growth to be a decent harvest size. Not a hugh crop but suits me as I don’t eat them too often.
I think I started my shop bought tubers (2) individually in small pots of compost, just covering the tubers and then in a propagator. I don’t think they took long to start producing leaves and they haven't looked back.
Easy to grow, minimal work, looks good and produces a crop, my type of plant ;D
