My OH had problems with germination of seeds earlier this year, then changed the compost he was using (woody and bits) to Verve seed and potting compost from B&Q. Seeds germinated well.
www.diy.com/departments/verve-peat-free-cutting-sowing-compost-35l/5063022049766_BQ.prd
Who's Controlling The Straits of Hormuz?


