The soil im using is a 50/50 mix of 2 soils. It does appear to have perlite in it. Here are the ingredients straight from the web page in both soils contents.
Espoma organic potting mix
Ingredients:
This product contains 60-70% processed forest products, sphagnum peat moss, perlite, humus, limestone to adjust pH, earthworm castings, alfalfa meal, kelp meal, feather meal, & yucca extract.
Active Ingredients:
Ectomycorrhizal Fungi: A total of 122.8 propagules / cc (3.4 million propagules per cubic foot) of the following 3 species:
Pisiolithus tinctorius 105.66
Rhizopogon luteolus 8.57
Rhizopogon roseolus 8.57
Endomycorrhizal Fungi: A total of 0.072 propagules / cc (2,040 propagules per cubic foot) of the following 4 species
Rhizophagus irregularis 0.018
Septoglomus deserticola 0.018
Claroideoglomus etunicatum 0.018
Funneliformis mosseae 0.018
Espoma Land and Sea Mix
Ingredients:
This product is regionally formulated from 35-45% aged forest products, sphagnum peat moss, humus, limestone to adjust pH, lobster meal & crab meal.
In New Hampshire this product contains aged forest products, sphagnum peat moss, humus, limestone to adjust pH, lobster meal & crab meal.
In California & Oregon this product contains aged forest products, sphagnum peat moss, humus, limestone to adjust pH, lobster meal & crab meal.
Active Ingredients:
Ectomycorrhizal Fungi: A total of 131.38 propagules / cc (3.7 million propagules per cubic foot) of the following 5 species:
Pisiolithus tinctorius 105.66
Rhizopogon luteolus 8.57
Rhizopogon roseolus 8.57
Scleroderma citrinum 4.29
Scleroderma verrucosum 4.29
Endomycorrhizal Fungi: A total of 0.072 propagules / cc (2,040 propagules per cubic foot) of the following 4 species
Rhizophagus irregularis 0.018
Septoglomus deserticola 0.018
Claroideoglomus etunicatum 0.018
Funneliformis mosseae 0.018