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Is there a very good opportunity to peated compost?

Peat harvesting tools at a bog in the Scottish highlands (Credit: Getty Images)

Harvesting peat is especially unsustainable – however gardeners love it. Could we update it with some thing higher?


In a greenhouse in Nottinghamshire, Barbara Wright is developing peat.

Well, now no longer peat precisely. Wright’s company, BeadaMoss, is developing sphagnum moss – the primary aspect of herbal peat extracted from northern peatlands to be used in gardens throughout the United States and Europe.

BeadaMoss has been developing sphagnum for round 15 years, first of all to plant this on degraded peatlands as a fast-tune to peatland restoration. But, sparked with the aid of using environmental issues over using peat in horticulture and a looming restriction in this use withinside the UK, BeadaMoss is now investigating the exceptional manner to develop sphagnum moss as a alternative for the baggage of peat-primarily based totally developing media determined broadly in lawn centres throughout the world.

Natural peatlands store two times as an awful lot carbon as all of the world’s forests, however they’re unexpectedly disappearing because of great extraction. There are finite reserves and peat takes lots of years to form.

One institution this is been specifically immune to giving it up is gardeners. They use it for fertilising and enhancing the soil, and as a key element in potting mixes for developing new vegetation. It’s prized for its spongy texture, which lets in it to maintain onto each water and air – each of which are crucial for growing roots.

Peat-unfastened compost has end up more and more more to be had over the ultimate decade, however traditionally it’s been criticised for now no longer being as exact – with a few replacements accused of being dry, inconsistent or low in vitamins.

But as recognition of the carbon effect of peat has grown, agencies and researchers on each aspects of the Atlantic are stepping up efforts to locate opportunity answers withinside the quest to update this extraordinary material.


Peat is a herbal substance fashioned of vegetation (frequently mosses) which have partly decomposed below waterlogged, anaerobic conditions however nonetheless keep their one-of-a-kind spongy structure.

While many exclusive kinds of peat develop in exclusive locations withinside the world, sphagnum moss – the plant that creates the form of peat commonly utilized in gardening and horticulture – grows in wetland loos in bloodless northern climates.

Peat extraction reasons an entire array of environmental problems. Firstly, it destroys habitats. “Quite a number of the vegetation and bugs and different animals that stay [in peatlands] do not stay everywhere else,” says Judith Conroy, a researcher at Coventry University’s Centre for Agroecology, Water and Resilience (CAWR). “It’s a definitely precise habitat. And after you dig it up, it turns into a barren wasteland, basically.”

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Peatlands additionally act as herbal flood barriers, as their spongy texture slows the passage of water at some point of heavy rainfall events.

But possibly the maximum placing function of peatlands is the overwhelmingly massive quantities of carbon they store. “Roughly three% of [global] landmass is peatland however it has the ability to take in and sequester greater carbon than all of the plants on land, and over lots of years,” says Alistair Griffiths, director of technology on the Royal Horticultural Society (RHS). When peat is extracted from peatlands, this carbon is launched to the atmosphere.

These troubles are compounded with the aid of using the reality that peat takes a completely long term to form – it grows at a price of round a millimetre consistent with year. “It is sort of like a younger fossil fuel,” says Conroy. “It’s simply now no longer been there pretty so long as oil or coal; it is been there lots of years instead of tens of thousands and thousands of years.”


Peat first started to be broadly utilized in gardening across the 1940s, says Conroy, however it changed into definitely the arrival of lawn centres withinside the Sixties and 70s, encouraging the transfer from domestic compost to bagged developing media, while it started for use greater broadly.

Before the rise of garden centres, most people made their own compost (Credit: Getty Images)

Some 1.7 million cubic metres (60 million cubic feet) of peat had been used withinside the UK in 2021, despite the fact that the 2020 growth in lockdown gardening noticed a transient growth to 2.three million cubic metres (81 million cubic feet). It debts for 30% of all developing media bought withinside the UK. However, as maximum of the United Kingdom’s peatlands have already been degraded, it imports an awful lot of its peat from Ireland and Eastern Europe.


For years, the United Kingdom authorities has mentioned limits at the sale of peat. Voluntary goals set to give up the sale of peat in domestic-lawn merchandise with the aid of using 2020 had been missed, however in overdue August 2022 the United Kingdom announced a ban for England in 2024. The ban simplest goals bagged retail developing media, which debts for 70% of the peat bought withinside the UK. A voluntary goal to give up using peat withinside the expert quarter with the aid of using 2030 stays in place.

The lengthy-time hazard of this ban has sparked a massive exploration of peat options withinside the UK, says Brian E Jackson, a horticultural technology researcher at North Carolina State University. In North America, meanwhile, which reassets the significant majority of its peat from Canada – domestic to 1 / 4 of the world’s peatlands – no regulatory measures are presently at the table, he adds. “In North America, there are very sturdy efforts going into peat options, however it is greater of a proactive approach.”

There are numerous motives peat has end up this type of nicely-cherished medium for developing vegetation. Firstly, it has a “nice, crumbly, sieve-capin a position sort of structure” which makes exact touch with the best root hairs of vegetation, says Conroy. Jackson notes that it additionally exact at preserving water and air, has a low salt content material and frequently a low PH – maximum vegetation pick barely acidic soil.

It’s additionally light-weight to transport, and a relatively “blank canvas” in phrases of vitamins. “Manufacturers can simply upload something vitamins they need to, very frequently artificial vitamins, and it’s going to hold on to the ones nicely and launch them, says Conroy.

In addition, many growers have truely end up used to it, says Griffiths. “In many ways, it is ‘this has labored and nonetheless works.'”

The mission for peat options is to provide some thing with the important physical, chemical and organic houses for developing vegetation – although it does not precisely emulate peat, says Jackson. Gardeners frequently assume the peat-unfastened media to be precisely like peat, he adds, however switching to peat-unfastened does commonly require a transition – which includes converting how vegetation are fertilised or how they’re watered. “In my experience, humans had been disillusioned due to the fact they anticipated the same result, now no longer knowledge that it is a exclusive material.”

It’s important that something replaces peat does not deliver its very own environmental troubles – an in particular essential attention for agencies making plans a massive scale-up of peat-unfastened developing media. “A lot of efforts are being accomplished to perceive the carbon footprint and the existence cycle evaluation or circularity of ways we use these materials,” says Jackson. “But we do not recognize the entirety sufficient but to say ‘that is certainly higher than that’.”

The studies for the ideal alternative for peat is a long way from over, however many peat-unfastened developing media have already been in use for many years. So what are the primary options?

Coir, that’s made from the lengthy fibres withinside the outer husks of coconuts, has been used for many years in developing media and is presently the maximum broadly used peat-unfastened opportunity, says Jackson. “It’s the near first cousin to peat in houses, and it is been used sufficient that there is familiarity with the way to use it to develop vegetation.”


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