Whether you're running a flood-and-drain system, building out a deep water culture setup, or simply looking to improve aeration in your soil or coco, GROW!T Clay Pebbles deliver the clean, stable, and reliable growing medium that serious growers depend on. Made from 100% natural clay, these pebbles create the ideal root zone environment — giving your plants the oxygen, drainage, and beneficial microbial activity they need to thrive from seedling to harvest.
Why GROW!T Clay Pebbles
GROW!T Clay Pebbles stand apart from generic alternatives because of their consistent pebble size (4mm–16mm), pre-washed finish, and exceptional structural integrity. Unlike lower-quality clay pebbles that crumble and compact over time — clogging drippers and reducing airflow — GROW!T pebbles maintain their shape cycle after cycle. Their unique porous structure maximizes surface area around the root zone, creating the perfect habitat for beneficial bacteria that naturally support plant health and nutrient uptake.
Growers choose GROW!T because they're pH and EC stable right out of the bag, compatible with virtually every hydroponic system, and versatile enough to use in soil, coco, aquaponics, and decorative applications. When consistency matters, GROW!T delivers.
Key Benefits
- pH & EC Stable – Extremely stable in both pH and EC, ensuring your nutrient solution stays dialed in without interference from the medium.
- 100% Natural Clay – Made from pure, natural clay with no synthetic additives — safe for organic and conventional growing alike.
- Superior Structural Integrity – Resists breaking and compacting, keeping dripper systems clear and airflow consistent throughout the grow cycle.
- Pre-Washed for Immediate Use – Arrives clean and ready to use, reducing prep time and improving stability from day one.
- Excellent Aeration & Drainage – Drains freely without holding excess water, maintaining optimal oxygen levels around the root zone.
- Promotes Beneficial Microbial Growth – Large surface area fosters the beneficial bacterial colonies that naturally support healthier, more vigorous plants.
- Reusable & Long-Lasting – Can be cleaned and reused across multiple grow cycles, making them a cost-effective long-term investment.
Use Cases
- Flood & Drain / Ebb & Flow Systems – A top choice for flood-and-drain setups where free drainage and oxygen retention are critical between flood cycles.
- Deep Water Culture (DWC) – Used to support net pot baskets and anchor root systems while allowing full access to oxygenated nutrient solution.
- Drip Feed Systems – Their structural integrity prevents compaction and clogging, keeping drippers flowing freely throughout the grow.
- Aeration Additive for Soil & Coco – Mix into coco coir or soil at a ratio of 4 parts clay pebbles to 7 parts medium to loosen structure and improve root development.
- Aquaponics – Ideal as a grow bed medium in aquaponic systems, supporting both plant roots and beneficial bacteria in a fish-safe environment.
- Decorative Top Dressing – Use as a top layer in potted plants to reduce evaporation, suppress weeds, and add a clean, professional appearance.
Directions for Use
- Rinse pebbles thoroughly with clean water before first use to remove any dust or fine particles.
- For hydroponic systems, fill net pots or grow beds with pebbles and place your seedling or cutting directly into the medium.
- For aeration in soil or coco, mix at a rate of 4 parts clay pebbles to 7 parts growing medium and blend evenly before planting.
- For flood-and-drain systems, ensure pebbles fill the tray to the appropriate depth and that drainage holes are unobstructed.
- To reuse, soak in a mild cleaning solution (e.g., diluted hydrogen peroxide), rinse thoroughly, and allow to dry before reintroducing to your system.
Ingredients / Guaranteed Analysis
- 100% Natural Clay (Expanded Lightweight Clay Aggregate)
- Pebble size: 4mm – 16mm
- pH Stable: 5.5 – 6.5 range compatible
- Pre-washed to reduce dust and improve immediate stability
What Growers Are Saying
"These clay pebbles have been a game-changer for my flood-and-drain setup. Consistent drainage, zero clogging, and my roots have never looked healthier."
— Marcus T., Commercial Grower
"I've tried several brands and GROW!T is the one I keep coming back to. They hold up cycle after cycle and my pH stays rock solid."
— Sarah P., Greenhouse Grower
"Used these in my DWC system and mixed some into my coco pots — great results both ways. Easy to rinse and reuse too."
— Daniel R., Home Grower
Frequently Asked Questions
What makes GROW!T Clay Pebbles different from other clay pebbles?
GROW!T pebbles are pre-washed, pH and EC stable, and manufactured with a consistent 4mm–16mm size range. Their strong structural integrity means they resist breaking down and compacting — a common issue with cheaper alternatives that can clog drippers and reduce airflow over time.
Are GROW!T Clay Pebbles compatible with all hydroponic systems?
Yes. They work well in flood-and-drain, deep water culture, drip feed, NFT, and multi-pot systems. They're also suitable for aquaponics and as an aeration amendment in soil or coco coir.
Do I need to rinse the pebbles before use?
While GROW!T pebbles are pre-washed, we recommend a quick rinse with clean water before first use to remove any residual dust from shipping and handling.
Can GROW!T Clay Pebbles be reused?
Absolutely. After each grow cycle, soak the pebbles in a diluted cleaning solution (such as hydrogen peroxide or a dedicated media cleaner), rinse thoroughly, and allow to dry. Properly maintained pebbles can last for many cycles.
What size bag should I choose?
The 10 L bag is ideal for small systems, net pots, or mixing into a few containers. The 25 L bag suits mid-size setups or growers who want a reliable supply on hand. The 40 L bag is best for larger systems, commercial trays, or growers who use clay pebbles as their primary medium.
How do I use clay pebbles to improve soil or coco drainage?
Mix GROW!T Clay Pebbles into your coco coir or soil at a ratio of 4 parts clay pebbles to 7 parts growing medium. This loosens the structure, improves aeration, and encourages stronger root development.
GROW!T horticultural clay pebbles are made from 100% natural clay. They are clean, pH stable, and offer great aeration and drainage in hydroponics, especially in flood and drain, deep water culture, and drip feed systems. Due to their unique structure and ability to cover a large surface area, they offer the ideal environment to foster beneficial bacterial growth around the root zone, leading to naturally healthier plants.
GROW!T Clay Pebbles benefits:
- Extremely stable in both pH and EC
- Made from 100% natural clay
- Strong structural integrity means that they are less likely to break and compact, which helps to prevent dripper systems from getting blocked
- Pre-washed to aid in stability
- Drains freely and does not hold any excess water, providing good oxygen levels around the root; suitable for flood and drain systems, multi-pot and drip feed systems
- Pebble size 4mm - 16mm
GROW!T Clay Pebbles can be used for:
- Aeration of growing media - ideal to mix into coco coir or soil to aid aeration
- Drainage - will hold water as well as offering great aeration properties and free draining
- Decoration - looks great as a top dressing for pots and also helps to prevent evaporation
- Hydroponics/hydroculture - used widely in hydroponic growing, they are ideal for flood and drain, deep water culture and drip feed systems
- Aquaponics - are also ideal to be used in aquaponic systems
When used in aeration of growing media, mix GROW!T horticultural clay pebbles into your coco coir or soil at a rate 4 parts clay to 7 parts soil to loosen up the structure, leading to better root development.