Legigo LECA Clay Pebbles 19 lb 4–16 mm Lightweight Expanded Clay for Hydroponics & Orchids, Reusable pH-Neutral

Legigo 19LB LECA clay pebbles are lightweight, porous expanded-clay balls (4–16 mm) designed to improve drainage, aeration, moisture retention, and reusable support for hydroponic systems, pots, terrariums, and orchids.

These 19 pounds of pH-neutral LECA (lightweight expanded clay aggregate) come in a resealable pouch and offer a clean, soil-free growing medium for a wide range of indoor and hydroponic gardening needs. The 4–16 mm size range fits small to medium pots and coordinates well with root zones of houseplants, orchids, microgreens, and hobby hydroponic setups. Baked at high temperatures, the pebbles are sturdy, odorless, and ready to reuse after rinsing.

How do these clay pebbles improve drainage and root airflow?

Legigo LECA has an open, porous structure that creates voids around roots so water drains freely and air reaches the rhizosphere. That balance reduces the risk of overwatering while maintaining enough moisture for healthy root function.

• Porous interior absorbs and slowly releases water and nutrients.
• Creates air pockets that elevate oxygen levels at the root zone.
• Prevents soil compaction when used as a top layer or mixed in potting mixes.

Can I use these pebbles for hydroponics, orchids, and indoor pots?

Yes — these LECA balls are suitable for hydroponic systems, ebb-and-flow trays, wick systems, orchid pots, terrariums, and as a soil alternative or amendment. Their neutral chemistry makes them compatible with common nutrient solutions and potting media.

• Works as a standalone substrate in many hydroponic setups.
• Mixes easily with soil, coco coir, or perlite to improve aeration.
• Ideal for orchids and epiphytes that prefer fast-draining roots.

How do I clean and reuse Legigo LECA for successive plantings?

Cleaning is simple: rinse, soak briefly if needed, and allow to dry. Because the pebbles are durable and chemically stable, they can be reused multiple times with minimal breakdown when properly cleaned between cycles.

• Rinse under running water to remove loose debris and salts.
• Soak in fresh water or mild vinegar solution for deeper cleaning, then rinse again.
• Air dry fully before storing in the resealable pouch to avoid mold.

What size and quantity are best for my pots and systems?

The 4–16 mm diameter range included in this 19 lb bag suits small to medium containers and many hydroponic applications. Use finer pebbles for small-rooted plants and larger pieces where rapid drainage and greater airflow are needed.

• Small pots (2–6 inches): use the smaller 4–8 mm pieces or a fine layer as a top dressing.
• Medium pots (6–12 inches): mix sizes for stable support and balanced drainage.
• Hydroponic trays and orchid baskets: larger 8–16 mm pebbles provide structure and flow.

Who this is for: Legigo 19LB LECA clay pebbles are designed for hobbyists and small-scale growers who want a versatile, reusable, and clean growing medium. Choose these pebbles if you run home hydroponics, repot houseplants, grow orchids, set up terrariums, or need an aesthetic, low-weight substrate for decorative planters. They fit gardeners looking to improve root oxygenation and drainage without the mess of loose soil, and they’re especially useful for people who prefer a long-lasting, pH-neutral aggregate that stores easily in a resealable pouch.