Aeration Additive
Aeration involves perforating the soil with small holes to allow air, water and nutrients to penetrate the grass roots. This helps the roots grow deeply and produce a stronger, more vigorous lawn. The main reason for aerating is to alleviate soil compaction.
Perlite
Perlite is expanded volcanic glass and adds air pockets to soils. Soils with added perlite will dry out quickly between each watering, which gives a grower more control over a feeding regiment. Perlite is light weight and relatively inexpensive, which makes it the most popular choice among commercial potting soil manufacturers.
Pumice
Pumice is a type of volcanic rock that is naturally porous. Like perlite, pumice has the ability to add air pockets in a soil, which results in higher oxygen content around the plant’s roots. Pumice is less commonly used by commercial manufacturers, however, simply because it is heavy and, therefore, expensive to ship.
