Mo Bacter is an organic fertiliser which releases its nutrients evenly over a twelve week period. It destroys moss and does not go black but is digested by the bacteria.
Lawns are left free of any debris with no need to scarify. It's completely organic, harmless to animals and wildlife, and doesn't damage border plants.
MO Bacter is best used in the spring, or early summer, to eliminate moss and late summer or early autumn to stifle its winter development. It is at its most effective when the ground temperature is 10C or more.