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Leca clay pebbles and growing media

Expanded clay pellets that offer stable support and drainage for DWC and tower systems

Data updated 2026-09-13 60 systems · 42 brands
Systems for fresh herbs Systems for vegetables Systems with LED grow lights Water and air pumps Vertical hydroponic towers Affordable Systems for fruits Systems for flowers Automatic timer systems Hydroponic plant food Hydroponic net pots and baskets Deep water culture systems Leca clay pebbles Propagation and cloning kits Black hydroponic systems Aeroponic growing systems 12 pod hydroponic systems Kits for beginners Replacement grow sponges Rockwool grow cubes Height adjustable grow lights 30 pod hydroponic systems Systems with quiet pumps White hydroponic systems WiFi and app controlled systems 15 pod hydroponic systems Gardening gifts for women 8 pod hydroponic systems Grey hydroponic systems pH adjustment and testing kits Gray 60 pod hydroponic systems Green Gardening gifts for men Brown Blue Fits 16 inch
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Affordable Systems for flowers Hydroponic net pots and baskets Systems for fresh herbs Deep water culture systems Brown Propagation and cloning kits Kits for beginners
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Expanded clay pellets that offer stable support and drainage for DWC and tower systems A listing can also sit on other filters if it matches more than one tag.

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Porous media for root aeration

These clay pebbles, often called Leca, provide a pH-neutral foundation for hydroponic plants. They work by holding moisture while leaving gaps for oxygen to reach the roots. This prevents rot in deep water culture (DWC) and recirculating systems.

The pebbles are reusable after a thorough cleaning and sterilization. This set includes options for both standalone media and complete bucket kits that use pebbles as the primary support for heavy plants like tomatoes or peppers.

Sizing and quantity options

This catalog includes various bag sizes and pebble diameters to suit different setups. Smaller pebbles fill gaps in net pots, while larger ones allow for better drainage in tall towers.

Maintenance and usage tips

Before adding these to your system, rinse the pebbles in a bucket to remove fine dust. This prevents sediment from settling in your reservoir or clogging your water pump. You can use these in net pots for 5 Gallon buckets or as a drainage layer in decorative planters.

Q: Do I need to wash these before use? A: Yes, rinse them to remove clay dust that can clog pumps. Q: Can I use them with soil? A: You can place them at the bottom of pots for drainage or mix them in to aerate heavy soil. Q: How long do they last? A: They do not decompose, so they last indefinitely with proper care. Q: Are they organic? A: Most listings here are made from natural clay fired in kilns.