On 29/04/2010 18:10, Stewart Robert Hinsley wrote:

http://www.sidtech.co.uk/iu/soup936104423291.JPG

I wouldn't be certain of the assumption that the odd one out came from a
sown seed and not from contamination of the compost.

Mmm hadn't thought of that. Looking closely at that compost it appears
very "sticky" and has large pieces. Is there specialist seeding compost
he should be using (that is perhaps "finer")?