Perlite is a lightweight, white volcanic mineral that loosens the growing medium and improves root aeration. It does not decompose or alter the soil pH, which is why it is one of the most commonly used soil amendments.
What to use perlite for
Sowing seeds — adding perlite to seed-starting soil prevents the growing medium from compacting and helps prevent seed rot.
Succulents and cacti — a mix with perlite drains excess water more quickly.
Rooting cuttings — pure perlite or perlite mixed with coconut fiber is a good rooting medium.
Houseplants — 10–30% perlite in the soil improves drainage in the pot.
The range includes a 4 l package for home use and a 10 l package (Agro) for larger-scale growing.
Other growing medium amendments, such as expanded clay and coconut fiber, can be found in the growing media category.
Frequently asked questions
How much perlite should I add to soil?
Usually 10–30% of the volume. For succulents and seeds prone to rotting, up to 50%.
What is the difference between perlite and vermiculite?
Perlite mainly aerates the growing medium, while vermiculite also stores water and nutrients.
