Finely graded 4mm seeding compost manufactured from composted organic material in accordance with BSI PAS100 (2018).
This is Green Waste Compost which is available in most Counties quite cheaply. Unfortunately it is usually quite coarse and have bits of wood in it. For this reason it has to be sieved which takes some time and makes this graded compost an attractive alternative. Green Waste Compost has an unusually good ability to hold water and stays moist even on dry days. This means that is is excellent for seeding and seedling establishment. It is certainly the best way of seeding that I have come across.
You don't have to make a seed bed, just scatter the seed then cover this with seeding compost to a depth of around 8mm. That is all you need to do - don't rake or disrupt the existing surface, just sprinkle the seed and cover with seeding compost. The seeding compost won't create bumps because it is totally organic and will disappear in the profile as it is consumed by micro-organisms. If you are seeding during the playing season it is best to mix top dressing with the compost to give it some body so that it stays in place when balls roll over it.
The key to good germination is to keep the seed moist (not wet). The seeding compost that I supply is very unusual because, unlike other composts, it retains water very efficiently. So watering once a day is sufficient to ensure a good germination - twice a day is better but unless the weather is exceptionally hot it probably isn't necessary. In growing weather you can expect germination in 5 to 6 days and you will probably have to start trimming the grass after 10 to 14 days.