October - February
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The autumn and winter climate will eventually slow and stop the grass growing. The GreenThumb Nutragreen 4 is a liquid-based micronutrient rich treatment. It is different from the Nutragreen 1-3 treatments in that it doesn't encourage growth. Instead, it's designed to stimulate chlorophyll activity for a stronger, more robust lawn that's better able to cope with the rigours of winter. In English, this means it helps the lawn slow down growth keeping it green without the use of Nitrogen.
Nutragreen 4 also dehydrates any moss that may have built up, helping to control it by slowing down its activity. By keeping the moss spores to a low level, it also prepares your lawn for any mechanical work.
As growth slows down, the combination of Nitrogen, Potassium, Calcium, Magnesium and/or Phosphorous is no longer necessary. Now we need to support the development of chlorophyll, promoting a greener colour, strengthening the grass and also aiding recovery after any mechanical work. The Nutragreen 4 treatment does this.
In addition to dehydrating moss, Nutragreen 4 scorches moss, so it can't absorb moisture. This treatment also breaks down the plant structure of moss making it easier to be removed with surface thatch during Scarification.