I have been growing it for 2 years.
I have 2 nice trees that I had to shorten last year. They are still not bushy. They almost die every winter though I have 10°C! The young ones, 1 year old, that looked dead though I knew they were not, are starting to grow now.
About water: very strange: a little dry and they shed leaves, and they seem to prefer a regular watering! I gave one to a neighbour, and it did not do well in a dry bad soil.
I also recommend to collect often, before the leaves get older, yellow and fall.
Mines flowered but never gave me any pod. I guess I am "too cold", or else there is a pollination problem.
its also good as a green manure crop
I do not think so, because they do better in a good soil, and because they are NOT A LEGUME. They are brassicales, so they are more related to cabbage and radish, hence their taste!
They have pods, but they are not in the pea family at all.
Still puzzling me, this is a strange plant...