Aurora Innovations Procision Perlite

The #4 grade refers to the specific particle size of the perlite, which is larger and coarser than standard horticultural grades. This size is specifically screened to provide maximum aeration and drainage, making it ideal for heavy soil mixes or containers that require significant airflow.

By adding this perlite to your soil, you create microscopic air pockets that prevent compaction. This allows roots to breathe more easily and helps excess water drain away, which is critical for preventing root rot and promoting vigorous growth.

While it is excellent for general potting mixes, the #4 grade is quite coarse for delicate seed starting. You might find it better suited for transplanting or mixing into larger containers where you need to maintain long-term soil structure.

The ten-mesh screening ensures that the perlite particles are consistent in size and relatively free of the fine dust often found in lower-quality bags. This consistency means you get predictable drainage and aeration throughout your entire growing medium.

No, perlite is an amendment, not a complete growing medium. It lacks the nutrients and water-holding capacity required to sustain plants on its own, so it should always be mixed with soil, coco coir, or peat moss.