Heavy fertilization can somewhat affect hippeastrum seed set. The more common problems are wrong timing of pollenation attempts and chromosomal incompatability.When it is possible,on difficult crosses I start as soon as the stigma begins to open and again a couple times later. The best time is when moisture can be seen on the female parts,IF it can be seen. Del On Saturday, January 23, 2021, 02:41:13 PM CST, Tim Eck via pbs <pbs@lists.pacificbulbsociety.net> wrote: Does anybody have any idea if there are growing conditions that affect fertility in hippeastrums? I am aware that many perennials initiate blooming better under stress than when well nourished so I don't fertilize or water them much before buds appear. But does a similar effect affect capsule abortion? I often see the capsules begin to enlarge and then shrivel up and I wonder if I didn't fertilize them if the same thing would happen. Right now I'm seeing about 85% of hand pollinated ovaries begin to enlarge but only about 10% continue to maturity, Any ideas? Thanks Tim _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net> _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>