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A foliar feed designed specifically for macadamia trees

K-Mac is a foliar applied liquid fertiliser for macadamia nut trees that helps build high brix levels.


Unlike the majority of potassium foliar products that are sulphate or nitrate-based, K-Mac is formulated with potassium bicarbonate. This gives K-Mac macadamia fertiliser a high pH, resulting in superior potassium (K) uptake. 


Potassium is essential to maximise nut size. With the inclusion of fulvic acid, K-Mac is perfectly balanced to provide the required levels to macadamia trees. It also contains the essential trace minerals associated with efficient metabolisation once inside the cell.

Invest in your soil and plant’s potassium levels

Potassium for macadamias - Zylem SA

K-Mac fertiliser benefits for macadamia trees

Farming Macadamias - Zylem SA

Maximise nut size

Improved soil draining - Zylem

Contains essential trace minerals

Natural Plant Pest Control - Zylem

High brix levels

Macadamia Tree Fertiliser - Zylem SA

K-Mac Product Details

K-Mac Technical Information

Macadamias perform well in any loose soil with a pH of at least 4.5 to 8.0. They also benefit from inputs of potassium, such as K-Mac. K-Mac macadamia fertiliser has a high pH (8.6), which results in superior potassium (K) uptake. 


Macro Elements

  • Potassium (K)
  • Nitrogen (N)
  • Phosphorus (P)

Micro Elements

  • Boron (B)
  • Iron (Fe)
  • Manganese (Mn)
  • Copper (Cu)
  • Zinc (Zn)
  • Molybdenum (Mo)
  • Silicon (Si)

Application of K-Mac fertiliser to macadamia trees

K-Mac can be foliar applied to a range of nut, fruit and vegetable crops. When it comes to fertilising macadamia nut trees specifically, it’s important not to apply any fertiliser for the first six to eight weeks after planting. Non-bearing macadamia trees need to be given time to overcome transplanting shock, adjust to the new environment, and allow the roots to grow out of the potting into the surrounding soil.


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Get the ultimate fertiliser for macadamia nut trees

Product Label

Frequently Asked Questions

Typical fertilisers for macadamia nut trees contain nitrogen (N) and potassium (K). K-Mac fertiliser for macadamias includes nitrogen, potassium, and phosphorus (NPK), as well as a number of micro elements. It is formulated with potassium bicarbonate for superior potassium (K) uptake.

The aim of a macadamia fertilisation programme should be to keep trees and root systems. It’s important to replace the amount of nutrients removed by the crop each year. However, you don’t need to fertilise macadamia trees for the first six to eight weeks after planting. We recommend applying K-Mac, a foliar applied liquid fertiliser specially formulated for macadamia nut trees.

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