I think someone was asking recently about organic methods of deterring
slugs. Although we sell these, we haven't tried them so I can't vouch for
them personally. However, the details a

Growing Success Advanced Slug Pellets (Ferramol®) 750g

a. based on Iron (III) phosphate (also known as Ferric phosphate).
b. does NOT contain methiocarb or metaldehyde.
c. Fully biodegradable.
d. Rain resistant.
e. Children, pets and wildlife need not be excluded from treated
areas (but store the product in its original container in a safe place out
of the reach of children and animals. Follow the directions for use
carefully).

Shop around a bit because prices vary.

--
Sacha
http://www.hillhousenursery.co.uk
South Devon
'We do not inherit the earth from our ancestors, we borrow it from our
children.'