SumaGrow’s product was approved in New Zealand as a fertiliser in late 2014 by the Ministry for Primary Industries, and the company has received an import and export permit.
Greenberg says Sumagrow can be very useful to New Zealand. "There is a nitrate leaching problem. Our product increases the holding capacity of the soil and can reduce leaching by up to 70 per cent. There are also marginal soils in the Far North ... Sumagrow should be able to alleviate those problems.''
Sumagrow is a soil amendment of concentrated living microbes found in healthy soils. The formulation is suspended in an organic humic carrier, and makes atmospheric nitrogen and extant soil minerals – phosphate, magnesium and calcium - available for uptake by plants.
Greenberg says products containing Sumagrow replace or reintroduce vital soil microorganisms that are lost or damaged by conventional farming methods including the overuse of chemical-based fertilisers and pesticides. The typical application rate, normally by spraying, is one litre of Sumagrow to 20 litres of water – and 10 litres covers one hectare.