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Practical advice on soil health, lawn care, gardening and farming — from the Healthy Earth team.

Why Silica is the Missing Nutrient in Australian Gardens
Soil Health
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Why Silica is the Missing Nutrient in Australian Gardens

Most gardeners focus on N, P and K — but silica is the nutrient that ties it all together. Here's why Australian soils are silica-deficient and what to do about it.

BioCare·15 May 2026
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The 5-Step Spring Lawn Prep Guide for Australian Conditions
Lawn Care

The 5-Step Spring Lawn Prep Guide for Australian Conditions

Spring is the most important window for getting your lawn right for the season ahead. Here's exactly what to do — and in what order.

BioCare·1 May 2026
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Understanding NPK Ratios — What Do Those Numbers Actually Mean?
Product Tips

Understanding NPK Ratios — What Do Those Numbers Actually Mean?

Every fertiliser bag has three numbers on it. Here's a plain-English guide to what N, P and K do — and how to choose the right ratio for what you're growing.

BioCare·18 April 2026
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Describe what's going on with your plants and Ella will diagnose the issue and recommend the right BioCare product — instantly, free.

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Ella

“My leaves are yellowing and I don't know why...”

That sounds like a magnesium deficiency. I'd recommend...