I have been using B&Q Verve and have noticed that after sowing seeds the surface becomes capped with a weird blue/green algae like substance. At the beginning of the season I thought it might be due low temperatures and low light levels. However, the same is happening with seeds sown in it over the past couple of weeks. the compost hasn't been over watered. Infact when the compost is dry it looks wet as the blue green surface is dark in colour. When I touch the surface of the compost it feels really cold...much colder than my JA Bowers seed compost which contains more sand.
Very strange. Has anyone else experienced this with Verve?
What are they adding to our compost?????!!!!!!
Duke