08/03/2026
Some houseplants grow better in expanded clay aggregate than in compost — the difference comes down to root aeration. 🪴
Expanded clay aggregate (sold in the UK as LECA or Hydroleca) creates the right balance between air and water. The porous clay balls hold constant moisture without waterlogging, allowing roots to breathe freely. This prevents root rot — the most common cause of houseplant death in pots.
Growing in LECA is known as semi-hydroponics. It works particularly well for tropical aroids — monstera, pothos, philodendron, and anthurium — because it replicates the airy, free-draining substrate they naturally grow in as epiphytes on tree trunks and branches.
Nine plants that thrive in LECA:
Monstera deliciosa: iconic split leaves, grows vigorously once roots establish in the clay.
Pothos (Epipremnum aureum): fast-growing, very forgiving, one of the easiest to start in LECA.
Philodendron: trailing or upright varieties both adapt quickly.
Snake plant (Sansevieria): benefits from the sharp drainage LECA provides — compost often stays too wet for this plant.
Anthurium: the aeration prevents the crown rot that kills anthuriums in dense compost.
Peace lily (Spathiphyllum): grows steadily in LECA with consistent watering.
ZZ plant (Zamioculcas zamiifolia): its rhizomes store water, making it well-suited to the semi-hydroponic cycle.
Alocasia: large tropical leaves with high moisture needs — LECA keeps moisture available without saturation.
Calathea: sensitive to irregular watering; LECA provides the consistency it needs.
Where to buy: LECA and Hydroleca are sold in British garden centres, hydroponics shops, and builders' merchants (where it is sold as lightweight aggregate for thermal insulation — exactly the same product). Rinse thoroughly before use to remove fine dust.
🪴 No compost, no fungus gnats, no overwatering.