wrote in :

Whiting is also used to reduce the temperature in a greenhouse.

And it's not the question that's silly!

Where do you get hold of it? I haven't seen it for years.


Most of the south of England is chalk... :-)

But true - I have not seen whiting for sale for a very long time (other
than in a fishmongers). Perhaps someone else can add that useful bit of
info?

--
Rod