Absolutely worth the trouble, Alice. The ones I have I bought from a specialist nursery near Newark in Nottinghamshire on different trips to UK and carried back in my hand luggage. On my last trip in late May/early June I managed to get 2 new ones H. greenii and H. raffilii. Apparently the severe winter of 2010/2011 had decimated his stock and he was just building it up again but he let me have these 2 (the begging on bended knees may have helped!!!). When I brought them back they had a single spike about 30 cm tall. I have planted them in my Hedychium area and will nurse them through this summer and winter in the hope that they will gain enough strength to put up a flowering spike next year. My established plants put up new spikes every spring, starting around May, and you can almost watch them grow they are so fast. I am around 190 cm tall and the flower spike in the photo in the above post is a little over my head, that's just under 3 month's growth.