Proteaceae / low-P
Macadamia Soil Mix
A special case, and the one mix we deliberately keep lean.
Why Macadamia Needs its own Blend
What the Blend does for the Plant
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Runs Lean on Phosphorus
No added concentrated phosphorus, matching Proteaceae's sensitivity.
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No Mycorrhizae by Design
Macadamia forms its own cluster roots and does not rely on fungal partners.
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Drains Sharply
Extra cinder keeps the root zone open on wet ground.
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Slightly Acid
Sulfur-adjusted toward the mild acidity macadamia prefers.
What's in the Blend
| Volcanic Topsoil | Body and cation exchange |
| Black Cinder | Sharp drainage and aeration |
| Cured Compost | Organic matter and biology |
| Biochar | Water and nutrient holding |
| HVO Base Blend | Broad organic soil feed, lean |
| Elemental Sulfur | Holds a mild acidity |
| Kelp Meal | Potassium and trace minerals |
| Rock Dust / Silicon | Broad micronutrients |
Planting Tips: Macadamia
- Never Add High-Phosphorus Inputs:
No bone meal, no rock phosphate, no high-P bagged products. Macadamia can be injured by excess phosphorus. - Mound on Wet Ground:
Macadamia wants air at the roots. Raise the planting spot on heavy or wet ground. - Mulch Heavily:
Macadamia feeds in a shallow surface mat. A thick mulch ring out to the drip line protects it. - Go Easy on Nitrogen Early:
Push slow. Overfeeding young trees builds weak, leggy growth. - Water Evenly While Young:
Keep moisture steady but never waterlogged through establishment.