Just read through the Arisaema 2009 thread, my eyes hurt from all of the supurb photos of amazing Ariseama species.
I have a question about what to do with A.heterophyllum seed harvested in the dead of winter (today, Jan. 11, 2010). For seven years I've grown two tubers of A. heterophyllum, and it is apparently a giant form, as mine always tops out at 6' (2 meters) to the tip of the spadix. I uploaded a few photos of the species in bloom for reference. Like some species, it is late to sprout, doesn't typically break ground until first week of June, then amazingly by the beginning of July it reaches 2 meters tall!
In all these years it has never set seed. This year, one of the stems fell over in a thunderstorm. Normally I'll keep the stems staked, but this year I just let the inflorescence lie on the ground, and lo and behold, it set viable red seeds this year. The problem however was that the seed did not ripen until very late, still not quite ready late November, then in early December we suddenly had lots of snow and subfreezing temperatures, rarely getting above freezing.
Today I decided to chop through the crusty layer of snow (30 cm thick) and retrieve the seed. The fruiting structure was frozen solid to the soil, so I lifted a plate of soil with the seed, brought it in to thaw. I normally sow Arisaema seed in situ in the autumn. Any recommendations for growing on the seed now, can I sow it on a warm windowsill, or should I keep the seed chilled in my refrigerator until spring? In one photo, there is a tape measure showing the spadix reaching 6', some people have doubted my claims.
