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Peat-Free vs Peat-Based Compost: Which is Better?

Peat-Free vs Peat-Based Compost: Which is Better?

To peat or not to peat, that is the question! Discover the pros and cons of peat-based compost and suggestions for alternatives.

By Amanda MacArthur | April 24, 2023

peat-based compost

It’s no secret that I love compost. For those just getting into gardening, compost is decomposed organic matter that can be used as a soil amendment in garden beds and container gardens. It helps vegetables and herbs retain moisture and prevent pests and diseases. Compost has helped my vegetable garden thrive over the years and is my number one recommendation when someone asks me what they can do to improve their soil quality. Compost can be made from worm castings, leaves, and even kitchen scraps. For decades, peat-based compost was a top choice among gardeners for its moisture and nutrient retention.

Peat-based compost is made from peat, a product naturally found in the bottom of waterlogged bogs. There are benefits and drawbacks to using peat-based compost based on what it does to enhance your soil as well as the environmental factors of harvesting peat. Here are some pros and cons of using peat-free compost vs. peat-based compost, to help you make your gardening decisions.

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Peat-based compost

Pros

  • Good at holding in nutrients from other sources (fertilizer, other organic matter).
  • Has a naturally low pH level which can be helpful for more acid-loving herbs, fruits, and vegetables, like blackberries, parsley, potatoes, and raspberries.
  • Holds its shape and doesn’t compact which makes it continue to aerate and drain well for years as compared to other types of compost.
  • Really effective at moisture retention.

Cons

  • Oftentimes more expensive than other locally sourced compost.
  • Doesn’t have many nutrients to enhance the growth of herbs and vegetables.
  • Susceptible to drying out and hard to re-moisten once dried.
  • Harvesting practices release harmful levels of carbon into the atmosphere and leave peat bogs dry and prone to wildfires.

Peat-free compost

Pros

  • Many types of peat-free composts are available to choose from at every price point.
  • You can make your own compost in your backyard using different methods.
  • Peat-free alternatives like coco coir (made from coconut husks) and sheep’s wool waste (pellets made from leftover sheared wool) offer the same moisture retention as peat.
  • Many composts can serve double duty as mulch as well.
  • Most peat-free composts contain healthy microorganisms that offer nutrition and aeration to vegetables and herbs.

Cons

  • The composition of compost can vary in texture and material from one scoop to the next and must be well mixed and incorporated.
  • Compost can contain weed seeds that won’t be killed off if compost is does not reach high enough temperatures.
  • Some composts can contain contaminants if not made with correct organic materials.

Bottom line: read your labels and choose what is best for your garden

It would be easy for me to say avoid peat-based compost at all costs, due to environmental concerns. But there are groups of peat manufacturers doing some interesting work around peat conservation that involve more ethical harvesting practices. With more peat-free compost options becoming more affordable, like coco coir used in container garden potting mix, you may consider reducing your peat use. Ultimately the choice is yours. I encourage you to read your compost labels and do your own research to find the best products for your garden.

Do you use any peat-based or peat-free compost products in your garden? Which ones do you like the best? Let me know in the comments!

Discover 7 top tips for growing, harvesting, and enjoying tomatoes from your home garden—when you access the FREE guide The Best Way to Grow Tomatoes, right now!

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compost can, my vegetable garden, vegetable garden, vegetables and herbs

Comments
  • Shirley R. May 24, 2023

    I haven’t found a single peat free compost that I like better than peat based compost.I used some ericaceous peat free compost to mulch my well established rhododendrons and three of them died .The peat free stuff dries out too quickly and seems to have no substance.I shan’t be able to buy any more acid loving plants in future.It’s rubbish.

    Reply
  • Valerie C. April 24, 2023

    I like Malibu Compost certified organic, non GMO & is biodiverse. They have seed starter that is nice and fluffy. It’s more expensive but a little goes a long way.
    I heard about it on iTunes podcast “The Healthy Garden.” I learned so much on there.

    Reply
  • Valerie C. April 24, 2023

    I like PittMoss. Environmentally friendly & works great.

    Reply
  • Mrs. S. April 24, 2023

    I live close to the Somerset levels where a local company has been carefully managing the peat beds for many years. I use their specialist compost composed of peat and loam. I would like to add further comments not directly concerned with the actual compost. I use a locally produced product, I drive no more that 14 miles in a petrol powered vehicle, and always ensure I carry the maximum my vehicle will take. Compare with coir (coconut) based compost which has travelled thousands of miles on diesel powered ships, transported in diesel powered lorries for distribution around the country. In order to be fair I have tried coir based compost and found it to be a nightmare where watering in concerned, initially appearing to be waterlogged, then rapidly draining, leaching out nutrients and leaving plants dehydrated unless carefully watched. Incidentally my watering regime uses rainwater from my large number of water butts, using hosepipes to syphon water to where it is required – frankly I resent being constantly lectured regarding the use of peat, especially as in this area (Somerset) we are keenly aware of protecting our wildlife and the levels are being sympathetically managed to rewild the wetlands.

    Reply
  • Alex M. November 15, 2022

    Prior to sowing seeds, I sieve my compost and I find peat based compost is easier to sieve.

    When I’m pricking out seedlings, I use a pest free or home made compost and everything grows really well. ????

    Reply
  • Mary J. June 28, 2022

    I bought organic Miracle Gro potting soil with coir this year for the moisture-retaining property in containers, but some of my plants died with what looks like fungus or mildew on them and I am wondering if it retains too much moisture and makes problematic conditions? These containers all have adequate drainage and I’ve not had this problem before with other potting mixes. I use my own homemade compost in the garden beds for flowers and vegetables.

    Reply
  • Gardener F. April 25, 2022

    I am using Miracle Grow Multi Purpose compost and it is awful. It is full of large hard lumps and a large amount of tough straw like fibres and woody pieces. It is almost as though it has not been chopped or shredded properly. It really is only a step away from bark mulch! It is definitely NOT multi purpose as you cannot use it for potting on or seeds or cuttings.

    Reply

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