Searching on "saponaria propagation" (note spelling) on Google produced
1,400 links. You might try the same.

--beeky

Dan D. wrote:

Greetings, I've got a single stem garden phlox, sapinaria officionalis.
It's come back each spring for 3 years but has not multiplied.
There was still only a single stem last summer.

Any ideas how to propagate this plant?
Thanks!

Peace!
Dan D. Louisville Ky good ole USA
http://ky-dan.com
E-mail kydan at myrealbox dot com