When I repot my plants could this old soil mixed with vermiculite and perlite be dumped in the compost pit?
The ingredients are: iron, water, cellulose, vermiculite, activated carbon and salt. When the iron is exposed to oxygen it oxidizes (rusts) releasing heat. The salt is a catalyst for this oxidation and the carbon help disperse the heat. The vermiculite is an insulator for retaining heat.
