Having read articles on http://www.thevegetablepatch.com/ that suggest
avoiding pressure treated timber and the explanation as to why on
http://www.organicgardening.com/watc...eatedwood.html I am starting to
think. I have grown my lettuce and carrots in a home made wooden box
constructed from pressure treated timber which I have painted green (garden
fence paint). Do we use the same chemicals here in the UK that are used in
the US?

Aside from that after two years the boxes need a little more paint
applying - insects have started to eat the inside of them (just a little).
Is there anything (safe) that I can paint them with that might last more
than 2 years, or is 2 years when in contacts with moist compost for 9 months
of the year good (I empty them out over winter).

Mike