It's been a decade since I last gardened and there's been a lot of innovations in cold frame coverings. In the past I used a covering material that was like white opaque feed sack material.It was bombproof and greens did well with the filtered light. It was sold back then by a couple in Canada (SAS?) who also shipped from the US. I can't find any supplier right now. If anyone knows the material I'm talking about do you know if it's still available?

Thanks!