Tim et al,
Are you aware of Legasee?
(http://www.allotments4all.co.uk/smf/gallery/7178_05_11_11_11_31_53.jpg)
Sounds like a great way of passing on your experiences to future generations. It's supported by a multi-national former employer of mine, there's a feature about it in my pensioner magazine. Website is here:
http://legasee.org.uk/
Wish my Father in Law was still around he joined up in 1934 when he was fourteen, :)