Perlite (heat expanded siliceous volcanic rock) is used to loosen heavy soils. It is also an excellent medium for starting seeds and rooting cuttings. Perlite does not degrade in time, making it a long-term answer to many gardening problems.
- For seed germination, fill your trays with a soil-less mix, plant the seeds, and spread a layer of perlite over the seeds, then water from the base of the trays until the top surface is moist.
- For bulb storage, alternate layers of perlite with your bulbs. Store in a cool, dark area away from moisture.
- Use for propagation, as a mix for succulents and much more.