Dear All, Here is a note from Nina Lambert to the Trillium list. She said I could post it on our list and reminded me that Trillium-l has open archives that everyone can look at and the url for them is included at the bottom. Subject: Re: Roscoea, the late comers To: TRILLIUM-L@NIC.SURFNET.NL > This genus also is a late starter for me, just like Arisaema candidissimum and fargesii.... Here in UpState New York as well. R. alpina, purpurea and scillifolia have self-maintained and self-sown in the open ground for at at least three decades, through bitter as well as wimp winters. R. auriculatata, beesiana, cautleoides, humeana, and tibetica have been in the open ground at least 5 but less than 15 years . So far they've been fine. None have been lost to date but recent winters have been mild. They work themselves in fairly deep over time, seem happy in clay and do best where they do not dry out during the summer. None emerge before the beginning of June. R. cautleoides is the first; tibetica, second. R. beesiana flowers around the end of the first week in July. R. auriculatata and humeana, a full month later. R. scillifolia (not showy but never quits) will throw occasional bloom well into September. All appear to want reasonable drainage but none tolerate drying out when in top growth. The taller ones have required staking as they tend to flop towards the end of the season. -- Nina Lambert, Ithaca, New York, USA - Zone V ====================================================================== Search the Trillium-L archives - http://listserv.surfnet.nl/archives/…