Cat(h) wrote:
snip 3) finally, do nematodes occur naturally in the soil? I
spotted some little grubs in post I was refilling which had a good
number of even smaller grubs apparently attached to them. One of those
I found had been sucked half dry by them.
snip

If the nursery from which you got the plants uses nematodes, then it's
perfectly possible they'll reproduce.
Here's a useful link on how to use them for both slugs and vine
weevils.
http://www.nickys-nursery.co.uk/seed...matode_faq.htm
--
Sacha
www.hillhousenursery.co.uk
South Devon