Plant growing media, Potting soils

Potting soil (synonymous compost) is a medium in which to grow plants, herbs and vegetables in a pot or other durable container. The first recorded use of the term is from an 1861 issue of the American Agriculturist.

Some common ingredients used in potting soil are peat,composted bark, sand, perlite and recycled mushroom compost.Although many others are used and the proportions vary hugely. Most commercially available brands have their pH fine-tuned with ground limestone, some contain small amounts of fertilizer and slow-release nutrients. Despite its name, little or no soil is used in potting soil because it is considered too heavy for growing houseplants. If you want this in a garden centre or nursery ask for "topsoil".

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