Ouch!
Brian Whyer (Tue, 27 Oct 2009 10:29:00 PDT)

I have rooted these in the past. Don't have to now as they increase fast enough not to be necessary any longer.

Brian Whyer, Buckinghamshire, England, zone ~8

Well, I figured out what was happening with the black “wire”, but I figured
it out too late: the black “wire” was in fact the sprout of one of the
Chilean Tropaeolum. Because these plants branch freely, no permanent damage
was done. The part of the stem I did not break off is perhaps eight inches
long and already had started to branch.