I have two that I planted this spring without knowing anything about them. Just noticed this week that the seeds are drying on the plants. I know they won't be true to type but does anyone know if they are even fertile? Anyone have experience with these in regards to drying, stratifying, etc?
What kind of Clematis are you growing?
I have the directions for germinating four kinds.
The easiest is clematis heracleifolia---the non climbing herbaceous one.
It just needs warmth and high humidity to germinate.
Last year I did it as a wintersow,but that was not necessary as it germinates readily in warmth.
On August 19, I spread seeds on a moist paper towel and there are lots of sprouts now at one month later.
I only obtained one plant from winter sowing, but then I do not know how fresh the seeds were.
I think those are all clematis macropetala.
In which case the seeds need warmth and moisture for about 4 weeks at warm ( 70ºF).
Then 8 weeks, still moist, at 'frig cool temperatures.
Then move back to room temperature for germination which can take 2 to 6 weeks. Keep seeds moist through to germination. I use moist paper towels,but you could use moist, sterile starter soil.
Then when they germinate,they are transplanted to pots of potting soil.