What's the difference and when should one be used in preference to the
other? As I understand it, both perform the same function - that is to
improve drainage; should the former be used with cuttings and the latter
with more established plants (i.e. if you're repotting)? My father appears
to use them interchangeably but I reckon that, if they could both be used
for identical tasks, then why would they both be sold? I was potting on some
mystery plants (mystery because they were something new I'd bought and I'd
lost the packet and brain fog means I forget my own name sometimes!) and I
didn't know which to use, so I used vermiculite simply because we had more
of it.

So could someone please explain the difference to me (Monty Don only appears
to use vermiculite - I was hoping he'd use perlite for something so I could
fathom it out for myself)?

Thanks

--
In memory of MS MVP Alex Nichol: http://www.dts-l.org/