"Franz Heymann" wrote in message ...

Thanks, Rod. See my other replies in this thread.

R. rugosa isn't normally used as an understock for bush or shrub roses (imagine the suckering problems!). It is widely used to
produce stems for standard roses so my guess is that what you have is R. rugosa varieties on their own roots doing just what rugosa
does best.
We tried some rugosa cuttings for cheap rootstocks once but they weren't that cheap to produce and they didn't take buds very well.

Rod