Description

A lightweight, versatile growing medium designed to improve drainage and support healthy root systems. These expanded clay pebbles are ideal for terrariums, humidity trays and adding structure to repotting mixes—helping create the right conditions for plants to thrive.

Made by heating natural clay to high temperatures, each pebble forms a hard outer shell with a porous, honeycomb core. This allows them to absorb water and release it slowly, maintaining moisture levels while preventing waterlogging. Their insulating properties also help protect roots from sudden temperature changes.

A simple, effective addition to your plant care routine—whether you’re building a terrarium or improving drainage in everyday pots.

Key Features:

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  Lightweight expanded clay pebbles (8–16mm)


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  Improves drainage and prevents waterlogged roots


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  Absorbs and slowly releases moisture


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  Helps regulate temperature around roots


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  Ideal for terrariums, humidity trays and repotting mixes


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  Clean, durable and easy to reuse

The Nunhead Gardener Recommends:

Use as a base layer in pots to improve drainage, or add to soil mixes for better aeration. Also perfect for humidity trays—simply add water below the pebbles to increase moisture around your plants.