I got a box from B and Q several weeks ago and sowed it immediately. I reckon not a quarter has come up. I have sowed grass seed many times before, and never been so disappointed. I can still see seeds on the soil which has not sprouted nor been eaten by birds. Grass seed is supposed to be treated to make it distasteful to birds, by the way. I suspect that this seed was old, but there was no "sow by . . " or "use by . . " date on the box. I looked very carefully.