Soils and layers
Fine clay pebbles
Small expanded clay balls sized for shallow jars.
What the simulation uses
- Holds water
- 16 % by volume
- Water it keeps after draining; the rest runs down to the drainage.
- Pore space
- 80 % by volume
- Room for air and water between grains; low means roots suffocate when wet.
- Weight
- 400 g/L
- How heavy a litre is.
- pH
- 6.5 to 7.5 pH
- How acid it keeps the soil.
- Mould risk
- none
- How much fresh food it gives white mould; high-risk soils fuzz over in the first weeks.
- Nutrients
- low
- Plant food it brings.
- Presses down to
- 97 % of its loose depth
- How far pressing can pack it, keeping its weight.
Description
Small expanded clay balls sized for shallow jars. They drain freely and wick a little water back up.
Also called mini LECA.
Estimated, where sources were thin: values estimated from hobby and horticultural references; not measured.