In article ,
Roger Tonkin wrote:

Of my 3 rhubarb plants, all grew fairly well to well last year,
but two of them have put up only a few spindly shoots this year.
I assume that I have to start again, but is that likely to mean
that I need to get new stock (as distinct from taking offsets)?

Depends on the age of the roots. Mine usually last about 5-6
years before needing to be trimmed back - I tend to break off
side offsets without disturbing the whole plant if possible. I
left behind two large plants that had been cropping well for at
least 15 years when I moved.

Say, 5-6 years, and I did exactly as you said. My question is
whether I should regard the two weak plants as potentially infected
(or whatever). I can't see any evidence of that, except for the
small number of spindly shoots.


Regards,
Nick Maclaren.