Main ingredients of peat-free compost

Peat-free potting composts contain blends of various organic (plant-derived) materials – such as composted bark, coir, woodfibre and green compost – sometimes mixed with inorganic materials such as grit, sharp sand, rock wool and perlite. All these materials have their own physical, chemical and biological properties that are also different to those of peat, so it is worth trying a few different compost mixes to find one that suits your garden and the plants you grow.

In terms of sustainability and longevity, coco peat clearly has an advantage over sphagnum moss. While there are two options, both with similar benefits for plant growth, peat moss as a product has a greater negative impact on the environment. As such, there is only one positive choice to be made.

The best substrate for your plants depends on your plant, your home's environmental conditions, and your plant care preferences.You can also mix different substrates together to create a custom mix.

Peat free alternatives

  • 1
    Coir

    Made from the fibrous husks of coconuts, coir is a popular alternative due to its good water retention and aeration properties. It is also biodegradable and less
    acidic than peat.

  • 2
    Composted Bark

    Often derived from pine or other trees, composted bark is used in potting mixes and as a soil amendment. It provides good drainage and aeration.

  • 3
    Wood Fiber

    Produced from wood processing by products, wood fiber improves soil structure and aeration. It can also retain moisture well.

  • 4
    Rice Hulls

    These are the outer shells of rice grains. Rice hulls are lightweight, improve aeration, and help with moisture retention.

  • 5
    Perlite

    A volcanic glass that is expanded by heating, perlite is used to improve aeration and drainage in soil mixes. It doesn't retain moisture as well as some other alternatives but is useful for creating a well-draining medium.

  • 6
    Vermiculite

    A mineral that expands when heated, vermiculite improves water retention and aeration. It is often used in combination with other materials.

  • 7
    Composted Green Waste

    This includes compost made from kitchen scraps, garden clippings, and other organic materials. It improves soil fertility and structure.

  • 8
    Leaf Mold

    Made from decomposed leaves, leaf mold is a rich source of organic matter and helps improve soil structure and moisture retention.

  • 9
    Biochar

    Produced from pyrolyzed organic materials, biochar improves soil fertility and water retention while also sequestering carbon.

  • 10
    Kelp or Seaweed

    Seaweed is a beneficial compost or soil amendment, providing essential nutrients and aiding in moisture retention. The choice to use it depends on gardening needs, availability, and environmental factors.