In most basic potting soil mixes, the function of perlite is to prevent the soil from becoming too dense which would restrict how much oxygen the roots are able to absorb. ... Perlite is also the common medium for plants that don't require soil such as orchids and succulents.
What can I use instead of perlite?
What is a good substitute for perlite?
- Rice husks.
- Pumice.
- Horticultural grit.
- Granite gravel.
- Vermiculite.
- Calcined clay.
- Bark.
- Peat.
What plants need perlite?
For trees, shrubs and roses, mix perlite with the soil when backfilling the planting hole to stimulate root growth. Because Perlite improves aeration and drainage, it will assist the air-moisture balance and ensure better root development and turf growth.
