Peat-free gardening: Protecting peatlands directly from your garden

Key points at a glance

• Peatlands sequester more carbon per hectare than any other terrestrial ecosystem; extraction destroys this storage.
• Avoiding peat-based substrates is the most effective contribution to climate protection that garden owners can make directly.
• Alternatives such as compost, wood fibres, or bark humus improve soil structure and promote the diversity of soil organisms.

The ecological balance: Why peat must stay in the ground

Peatlands are highly specialised habitats. They have formed over thousands of years from dead plant matter in the absence of air. Due to these conditions—an excess of water and a lack of oxygen—complete decomposition cannot occur. This creates peat, which stores carbon permanently. When this peat is extracted for horticulture, the carbon is released into the atmosphere as carbon dioxide (CO2), accelerating climate change.

Furthermore, peatlands provide a habitat for highly adapted species. In intact peatlands, we find specialised plants such as the round-leaved sundew (Drosera rotundifolia) or the hare's-tail cottongrass (Eriophorum vaginatum). When a peatland is drained, these species disappear irretrievably. Industrial use for amateur gardening deprives these habitats of their very basis for existence.

Substrate analysis: What actually ends up in the pot

For peat-free gardening, we use substrates based on renewable raw materials or by-products from other industries. Here is a comparison of common components for your plant cultivation:

4 steps to a peat-free garden

1. Product choice when buying: When buying potting soil, strictly look for the label "peat-free". The term "reduced peat" merely means that a portion of the peat has been replaced by other substances—the ecological damage caused by the remaining peat content remains.
2. Home composting: Use your own garden waste. A properly managed compost heap not only provides valuable soil but also offers a habitat for the rose chafer (Cetonia aurata), whose larvae act as important soil improvers.
3. Choosing site-appropriate plants: Many species do not require highly specialised soil at all. If you are planting native perennials, a mineral-organic mixture of sand, compost, and topsoil is usually optimal. This saves money and conserves resources.
4. Mulching instead of peating: To retain moisture in the soil, avoid digging in peat. Instead, mulch with grass clippings or shredded woody prunings. This protects soil life such as the common earthworm (Lumbricus terrestris) from drying out and the heat of June.

Frequently Asked Questions

Why is 'reduced peat' not a good choice?

Reduced peat means that peat is still contained in the product. Only a completely peat-free product protects peatlands from further destruction and CO2 emissions.

Do my potted plants strictly require peat?

No. Modern peat-free soils based on wood fibre or bark humus offer plants excellent structure and nutrient supply without causing ecological damage.

How do I recognise good peat-free soil?

Look for the 'peat-free' label. High-quality products contain wood fibres, compost, or bark humus, which ensure good aeration for the roots.

Main article: Nature in the allotment: Step by step towards biodiversity