Thatch Busta which can be sprayed onto your lawn and it assists in the gobbling up of the thatch. One inch of thatch will be gobbled up in about a month, converting the thatch to food for your grasses.
Used at the rate of 100 ml to 10 litres of water to cover 100 square metres. you can use any domestic weed killers with Thatch Busta and in many cases you will get a better result in killing the weeds. Apply Thatch Busta when soil is moist, any time of the year, then use again in the spring and autumn. High traffic lawns may need a more frequent application.
Simple to use and saves you the work of having to use a scarifying rake.

Thatch is more than just an accumulation of grass clippings at the soil surface. Thatch is an intermingled organic layer of dead and living shoots, stems, and roots that lies between the soil surface and the zone of green vegetation. Its development is related to a number of factors, which affect the rate it develops, or the rate it is decomposed by micro-organisms in the soil.
A thin thatch layer can be tolerated in some lawn situations. In fact, a small thatch layer can help to increase turfgrass wear tolerance. However, if this layer is allowed to accumulate unchecked, lawn problems will develop. Excessive thatch layers result in increased insect and disease activity and mower scalping injury. Other problems related to excess thatch build-up include reduced tolerance to heat, drought stress, and reduced tolerance to low winter temperatures.
Whether thatch is a problem or a potential problem is determined by the positive and negative influences affecting thatch formation and decomposition.
Foremost in this scheme is the inherent thatching tendencies of different types of turfgrass. (Brown Top is especially bad for thatch build up) Thatch formation is further influenced through management practices.
Increased stimulation of turf growth through excessive fertilizer use (especially nitrogen) or frequent irrigation will increase the rate of thatch development. Fertilizer and water use should therefore be programmed to produce a quality turf without over-stimulating its growth. Infrequent mowing or too high of a mowing height also favors thatch formation. Mowing should be ideally at 3.5 cm. Or there about.