If you have dried cleaned seed - Arisaema triphyllum , Sow at Max. 41ºF, germination irregular, often several months If you have fresh, or seed not yet harvested, you might read through this article by Tony Avent Here is a link that might be useful: Tony on the Road - Arisaema

Tiff, this is one of those times you're going to wish you had fresh seed, because those would germinate in just a few weeks with no chill :) I made a huge mistake when buying plants on site at the former Heronswood - they were so expensive, I purchased ONE of some, and the flowers come male or female...no ripe seed! Gotta open my wallet and shop somewhere again this year, spice up their dating/mating life. Dried stored seed can take a few months (you'll want to soak 24 hrs minimum before sowing, even if WS), and germination is sporadic/erratic, about the time you give up on more, another seed will germinate. You aren't likely to have any significant growth the first year, a. consanguineum needs to form a tuber before it shows much above soil that you can appreciate. I think you should plan on keeping the seedlings in pots at least the first year so choose your container/depth accordingly, or you could pot up individually later. This is a GREAT plant though, so I hope you get good germination and lots of seedlings. With your taste in plants, do you have a copy of The Explorer's Garden, Hinkley? Lots of interesting propagation notes and cultural information, I think you'd really enjoy the book.

Jacks move easily. Not sure where yours are in the growing process. Mine are just peeking out. If you dig deep enough and get a good clump it is possible to not even disturb the roots and corm. I have moved mine around my lot often. I have some in pots that do return each year. Now or after they begin die back are the best times. If you move them while they are blooming they may die out but will return next year. The lilac you can also dig a clump of root stock out. I was told doing this will shock the new clump and it will take five years to bloom..you may be better off just starting from nursery stock.

ken_mce, with so many seeds and corms under the ground, you would be weed whacking twice a week for years. Plus the fact that precision whacking isn't easy. These monsters are in with all my perennials. You can't suffocate them. I have moved big rocks in my garden only to find pinellas I hoped to suffocate still there and growing vigorously after two years! The only difference is lack of color, which they quickly regain. I spoke with a professional gardener friend of mine. He told me the only thing that will keep it under control (not eradicate) is a over the counter spray designed to kill poison ivy. Even using the spray, there are problems: 1/ there are literally hundreds of tiny seeds and corms in the soil that havenâÂÂt sprouted so one good spray job wonâÂÂt get rid of the future generations 2/ these plants are so hardy that often one application wonâÂÂt do it. You need to go back after a couple weeks to reapply. I intend to keep after them with the spray. Digging them out is thankless and futile. IâÂÂve thrown my organic principles to the wind and will use the spray.