Thanks very much for that report, Angelo. In horticulture, related to fruiting trees, the benefit of cold to encourage bloom is not as one might imagine. Effective chilling hours is only in the range of 34°-48°F. Anything lower or higher does not actually contribute to the necessary chilling hours for bloom success. I suspect this is true for Lycoris, but it would be based on ground temperature as opposed to air temperature. Somebody needs to do a study on that. ;-) Everything I grow is in full sun, and the one disadvantage as I see it is length and quality of bloom. For instance, L. sanguinea, and many progeny with its parentage, can show scorched blooms in as little as one day in full sun with highs in the upper 80s+ (F). All plant growth is best in full sun, and this can be accomplished under deciduous shade and in certain locations near walls and buildings, where the foliage receives full sun in the winter and early spring, but shade takes over in the summer. Also, if you are not digging and dividing your bulbs every 7 years or so, bloom can all but disappear, even though you may have a huge clump of foliage. -- Mr. Kelly M. Irvin 10850 Hodge Ln Gravette, AR 72736 USA Home Phone: 479-787-9958 USDA Cold Hardiness Zone 6a/b Facebook: https://www.facebook.com/kelly.m.irvin On 9/25/20 3:08 AM, ang.por--- via pbs wrote: > I see most of the post about Lycoris are concerned on cold hardiness, but I don't see many people from warmer areas i.e. California reporting any contribution. I grow many hundreds of radiata, elsiae, houdhyshelli, straminea, longituba, sprengeri, chinensis, squamigera, incarnata, aurea, with some of them in several clones and all flowers profusely every year. Some of them like radiata and elsiae are in full sun all year round, while other benefit from deciduous trees shade. Also I have grown from seeds sprengeri and have a flowering generation raised here, they took 7-9 years to bloom. I get little or no frost, just few days at -1°C (30F), only occasionally lower, but easily summer temps are 35-38 °C for weeks (96-100F) and no rain for months.Angelo PorcelliCentral Apulia-Italy _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…