Cold/Moist - I stratifying seeds for 60 days Our house temperature of 65°F produces excellent germination rates. Culver's Root seed does require light in order for germination to occur, with that in mind be careful not to cover seed with potting soil.
Fall Sowing - This is the easiest method. Seedlings grow stronger and sturdier when they are provided with a simple cold frame covering.
Growth Rate - Growth Rate - Very slow - Culver's root was started in February 2015 at the same time as other seedlings. Although, I had hundreds of sprouts they are considerably smaller then I would have expected. Over the years I have learned to wait until night and day time temperature are closer to 70°F before planting.
Collect seed - Late in the fall, when it is brown and easily released from the flower stalk. Lean dried stem into a paper bag without breaking it. Start at the top and work your way down, loosening the seed as you go. I wear gloves, as the seeds are coarse. Only harvest what you need, I suspect that squirrels, chipmunks and birds will appreciate your generosity.