Hello Angelo, Your observations about the temperature of sand on a beach are very true. Reading your remarks about temperature in a pot exposed to sun are equally valuable. Having moved to Portugal which naturally has a much hotter sun than Germany I often wonder how much heat the roots of various plants can take especially in black plastic pots. They become so hot on the side facing the sun that they can be barely touched. I have often wondered if the very old gardening tradition in Italy uses huge terra-cotta pots, especially for citrus plants for this reason. They are always cooler due to evaporation through the porous clay. Back to my Urginea on my drystone wall: it is a free standing old wall between our neighbor and our land in full sun and it gets very hot in summer. It is also hosting Ceterach officinarum which dries up and curls completely only to resurrect with the first rain. It definitely means that Urginea is VERY tolerant of hot root run. And back again to Pancratium your observation is most probably the key to the failure. It is obviously NOT tolerant of hot root run. Thank you Bye for today Uli _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…