Posted: 23/05/2012 at 09:52
A couple of weeks ago I got hold of 12 sacks of compost from the London Eco Waste Centre (the waste centre that gets all our green waste and most of North London)
After running out of seed compost I thought I could make my own, so googled it and make a mixture of seived compost, sand and perlite.
Every single pot and tray i used it in has gone moldy
All my seedling have dampened off
Any thoughts on what went wrong 
Some of the seeds sown were second sowings as squash, pumkins and sweetcorn were disasterous the first time.
So we have to think about 3rd time lucky