I've used 501 in glashouses on tomato plants. The fruit flavours were much
improved.
Much the same rules apply as those for outdoor plants; look
at leaf form. If it is round and juicy 501 is helpful provided the other
preparations are still active. If the plant has smaller, pointy leaves with
more pronounced serations, preparations from the 500 end of the spectrum are
called for, and or a feed.
Peter.
What sort of experiences have you (anyone) had with using 501 in a
> > greenhouse? I think that Grotzke advised that it is too strong for
> > use in a greenhouse. (?) For this reason, I have held off using it.
> > First outbreak of aphids makes me think of using it. I think heinz
> > mentioned a residual and a generalized effect that henceforth makes
> > the house uncomfortable for seedlings.
> >
> >
> > But, what is you life experience?
> >
> > Thanks
> >
> > -Allan
