Hello Anita and Ben For the disappearing Arisaema I still don't understand if you planted dormant tubers or actively growing plants of A. sikokianum in late summer. As I have never been able to grow this plant myself I don't know how long it's growing cycle is. Dormant Arisaema tubers lose their roots completely unlike many other geophytes so will not settle in a new environment. Somehow your growing conditions of the pot grown plants must differ from open garden culture, is it drainage? Thank you Ben for your remarks on the tetraploid Fritillaria. But tetras do at least bear some fertile seed in general or am I wrong? Is the Dutch commercial stock of this bulb only propagated vegetatively? It is so strange that all my other F. Imperialis never set seed and this one does but without any germination. Thank you and bye for today Uli Von meinem iPad gesendet