Position
Select a location in your yard that gets full sun and is sheltered from the wind. The south or west side of a less windy garden is most suitable.
Size
Macadamia nut trees can grow to between 5 and 15 metres tall in the garden, but they can be grown in large containers too.
Soil
These trees favour acidic to slightly acidic soil that drains well. If your garden soil isn’t deep, well-draining, and fertile, add perlite or sand.
Because they like slightly acidic soil, use a bag of acid compost. Firm the soil around the roots to eliminate air pockets, and water deeply after planting to help reduce transplant shock. Add as much organic matter or compost as possible to the hole or pot before planting.
Mulching:
Add a thick layer of pine bark mulch, keeping it about 20 to 30 centimetres away from the tree trunk (any closer may cause excess moisture and damage the trunk). This will retain the moisture in the soil and will prevent weeds from taking over.
Fertilising:
To ensure good growth and fruit-bearing macadamia nut trees need high nitrogen, phosphorous, and potassium. Use our slow-release nitrogen-rich all plant fertiliser Apply 1 teaspoon every 4-5 months
Pests and Diseases:
Aphids, citrus psylla, red scale, citrus greening. Spraying regularly with Agricultural Neem Oil or Effective Microorganisms (EM Control ) will assist in either prevention or after the fact. If you already have aphids or mites, wash the tree with a strong spray, then, when dry, spray with Neem oil or EM Control.
Practice good garden hygiene (remove fallen fruit and leaves).
Watch for root rot (if overwatered) and fungal infections during wet periods.
Harvesting
Collect your nuts every few weeks in the wet weather. Harvest when the outer shell cracks or the nuts fall to the ground.
