This comes from the Plants for a Future website - http://www.pfaf.org/user/Plant.aspx?LatinName=Darmera%20peltata
"Propagation
Seed - surface sow as soon as it is ripe or in early spring in a cold frame. Keep the soil very moist. The seed usually germinates in 1 - 3 months at 15°c. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts.
Division in spring. Very easy, larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring."
18 Jul, 2011
This comes from the Plants for a Future website - http://www.pfaf.org/user/Plant.aspx?LatinName=Darmera%20peltata
"Propagation
Seed - surface sow as soon as it is ripe or in early spring in a cold frame. Keep the soil very moist. The seed usually germinates in 1 - 3 months at 15°c. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the greenhouse for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts.
Division in spring. Very easy, larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring."
Hope that helps.
18 Jul, 2011