OK, so here's a challenge for any botanic garden: pick a rare bulb (have to trust them to make a sensible choice there) and produce 100 of them in 5 years. I don't care how you do it - seed, tissue culture, divisions, etc. The chances are, if you can do that, it will no longer be rare. Pick one every year ... If you can't do that internally, select an enthusiastic amateur and task them with the goal. There's a large army of capable and willing volunteers out there that I think are under-utilized. T