Posted: 15/11/2014 at 08:48
D.J.P. also will sucker quite nicely and the suckers may be carefully removed as a new plant. That is how we got the replacement for the one which was killed by the bad Winter a few years back.
D. mezureum can actually become a bit of a seed weed where suited. D. tangutica is a bit less prone to self seeding, sadly as is D. alpina.
Not got any others which produce berries to try.
The seed needs cold stratification to germinate by the way.