Go peat-free and leave the carbon in the bog
Most bagged compost still contains peat stripped from ancient wetlands that lock away vast stores of carbon. Choosing the 'peat-free' bag is a one-second swap that protects them.
Peat forms over thousands of years as bog plants die back faster than they can rot in waterlogged, airless ground. The result is one of the planet’s most concentrated carbon stores — peatlands hold more carbon than all the world’s forests put together, despite covering a tiny fraction of the land. Strip-mine a bog for a few seasons of bagged compost and you release carbon that took millennia to lock away, while destroying a rare habitat for wading birds, rare mosses and dragonflies in the bargain.
The frustrating part is that peat isn’t even a great growing medium — it’s used because it’s cheap, light and consistent, not because plants need it. Modern peat-free mixes built from wood fibre, composted bark, coir and green compost grow plants just as well once you adjust your watering a touch.
The one honest nuance is that peat-free behaves differently: it drains faster, dries on the surface while staying damp below, and runs out of feed a little sooner. None of that is hard to manage once you know — water little and often, feed after a month or so. Given the swap costs nothing extra and takes one glance at the bag, it’s about the highest-impact green choice a gardener can make.
How to do it
- Before you buy, flip the bag and look for the words 'peat-free' (torffrei) printed clearly — not vague claims like 'eco' or 'organic', which can still contain peat.
- Treat 'reduced peat' as a red flag: it still contains plenty. Hold out for fully peat-free.
- Match the mix to the job — a peat-free seed compost for sowing, a multipurpose or loam-based one for potting on; the texture differs from peat, so it's worth picking the right type.
- Water peat-free compost a little more often but less heavily — it drains faster and shows dry on top while still moist below, so check with a finger before reaching for the hose.
- Top up nutrients after about six weeks with your own compost or an organic feed, as peat-free mixes can run out of food sooner.
- Better still, make your own from a home compost bin and skip the bag altogether.
Pro tips & pitfalls
- Don't be put off if your first peat-free bag behaved differently — brands vary hugely. Wood-fibre, coir and bark-based mixes each handle water differently, so try another before giving up.
- Check the bags of plants you buy too: most nursery plants are grown in peat. Buying from a peat-free grower, or raising plants from seed yourself, closes the loophole.
What it's good for
Good for the planet
- Cuts CO₂ Peatlands hold more carbon than all the world's forests combined; digging them for one bag of compost releases CO₂ that took millennia to bank.
- Protects nature Lowland bogs are rare habitats for specialist birds, dragonflies and plants — leaving the peat in place keeps those homes intact.
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