By Annd
Belgium 
I grew some codonopsis pilosula from seeds. I now have several small plants a couple of months old. The stems are very long and thin. Should I pinch out the tops to make the plant stronger? Should I be supporting the stems upward now or wait until the stems are stronger?
3 Aug, 2012
Answers
No, leave them alone, Ann. They are a climbing plant that grows from a bulb. In a month or so they will die back to grow again next year. They have very narrow stems at the base of the plant which thickens as it scrambles through shrubs.
3 Aug, 2012
Thanks for your help!
6 Aug, 2012
pinch out leaves if you want it abit more bushy and when the stems are long enough (starting to go everywhere) then support them.
3 Aug, 2012