i have experienced this frustrating type of "eternal" sleep in some other genera, such as Sinningia, Dioscorea and some Araceae (Alocasia in particular, but also Amorphophallus and other tuberous aroids). plants sometimes are just very temperamental and if something is not to their liking, they won't come back... it's frustrating. but then, i'm just not a great grower, and plants have to enjoy some neglect to thrive with me. i have tried keeping Sinningia tubers totally dry and also a little moist; this did not yield any firm rules on how to treat them during dormancy. i have heard from other growers of Sinningia tubers being dormant for 2 or 3 yrs and magically resprouting. tsuh yang --- Johannes-Ulrich Urban <320083817243-0001@t-online.de> wrote: > I also have made the experience that some Tropaeolum > tubers just do not sprout > although they are firm and healthy. I grow mine in > pots in a frost free > greenhouse and keep the almost dry pots under the > staging during the summer > dormancy. T. tricolorum is very reliable and will > sprout every autumn but I > have a pot of T. brachyceras that grew for several > years but now is dormant I > think in its third year. I checked the pot in autumn > and found a rock hard > healthy tuber without any signs of desiccation nor > damage but it just does not > sprout. I do not know the reason. > There are also two pots of South African > Ornitohgalums that have even flowered > with me but now they have that same kind of dormancy > with firm bulbs that are > doing their second season of un-breakable > dormancy.......Hmmmmmm. Any advice on > how to talk them into growth? __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com/