Could anyone offer advice on how best to handle seed of the following species (dry seed from the exchanges this year): Trillium albidum, Trillium chloropetalum, and Pseudotrillium rivale.
My usual routine would be to soak the seed before planting it. What to do with the seed flats is the main question. Should the pots be kept at room temp for a while before cold stratification? How much cold should the seed pots experience? There is still plenty of snow on the ground here,although daytime high temperatures are trending upward (0 C to 10 C by day, and -8 c to -1 c overnight). I could place the pots outside, or in our cool basement for steady cool temperatures, or in an unheated polytunnel greenhouse (might get too warm during the day).
Any advice would be welcome.
I've successfully sown a few Trillium seeds over the years however our respective climates are like 'chalk and cheese' so I'm not sure any advice I can give you regarding temperatures we experience here would be relevant....
Heres a link to an article by Bill Cullina http://www.mtcubacenter.org/images/symposium-files/Cullina-William.pdf .It is based on his experiences in New England.
Bottom of the South Island New Zealand
Zone 8 maritime climate
1100mm,(40 in),rainfall p.a.
Nil snow cover
Thanks for the reply and link. I ought to have replied earlier but we are about to renovate the house in a major way (have to move out for several months while the work is going on). I decided to give the seed a soak, and plant it in pots to be sunk in the garden over summer, nature ought to be able to help keep things going. Trillium chloropetalum seed from the 2013-14 exchange has appeared above ground for the first time, so I'll just have to curb my impatience!
Southwest Nova Scotia, zone 6b or thereabouts
No worries Gordon.Best of luck with the seed and house reno .....
It's interesting how early T.rivale shows above pot surface level when grown in a shade house.Here's a pic taken this morning of seed sown x NZTG Aug 2014 .......In my experience seedlings like these will continue to grow through what we call a winter here in the southern hemisphere.
There is also some activity ? in another T.seed pot......
A better pic of germinated Trillium kurabayashii seed, showing the hypocotyl, bulblike rhizome and root.
Rick Rodich zone 4a. Annual precipitation ~24 inches
near Minneapolis, Minnesota, USA