Tip: Never use salty shells directly in soil. Salt damages plant roots.
🔥 Step 2: Crush and Grind the Shells Into Powder
The secret to unlocking the shell’s benefits is turning them into a fine or semi-fine powder.
🧰 Tools You Can Use:
A mortar and pestle
A rolling pin
A food processor
A small blender or grinder
A hammer inside a cloth bag (for large quantities)
🔧 How to Do It:
Break the shells into small pieces by hand or with a rolling pin.
Transfer them to a grinder or blender.
Pulse until you reach the desired texture:
Fine powder: best for mixing into soil.
Coarse powder: best for drainage or mulch.
Store in a dry jar or container.
🌿 How to Use Pistachio Shell Powder in Your Garden
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