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.
Dan, Why would you want to propagate a poisonous weed? Ah, building a playground, are we? Any how Saponaria officionalis has a hollow stem so cuttings won't work. You could pinch off the new growth and force branching or you could dig the plant up and try to divide the rhizomes. I would wear gloves. Pretty flower, by the way, looks like Pinwheel Jasmine (T. divaricata) that we have in zone 10.
Thanks for the spelling correction! I did some searching and found many sites that listed sapinaria officionalis as soapwort and a few other common names but none called it phlox so...... I searched for gargen phlox nicky and found many hits with pictures.
(We also have soapwort and it propagates itself just fine!! In fact it's invasive so we've put a root barrier around it to keep it in check.)
Obviously the label that came with the plant was wrong. What I have apparently is Phlox paniculata 'Nicky' Summer Garden Phlox and I'm still searching for ways to multiply this fragrant flower!
Thanks again! Peace!! Dan D. Louisville KY good ole USA
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