I am looking to re-seed my lawn in April and the seed I shall be using is similar to that used a lot in Florida, which gives a course/rough blade typically about 3-4 mm wide. Does not need much water and thrives in hot conditions.
It is best laid on sand, but the sand must have a regular particle size to allow regular spaces between the sand grains to allow the grass roots to grow deep into the sandy rooting zone. I have tried without success asking building supply companies for this type of sand. Does anyone know what I should ask for in French?