Due to business restructuring, we are currently not accepting any new orders.

Coconut Coir

4.92 out of 5
(12 customer reviews)

£5 (incl. VAT)

Coconut coir is made from the husks of coconuts which are then shredded and compressed into coir ‘bricks’. With high water retention and amazing resistance to contamination, they are a favourite choice of many home mushroom cultivators as a bulk substrate.

No need for steralisation and can be pasteurised using in the classic ‘bucket-tek’ method by simply adding boiling water and leaving until cool.

  • Suitable for small to large scale home mushroom cultivators
  • Indefinite lifespan if stored dry
  • Perfect for the beginner
  • Contamination resistance
  • Can be used as a casing

Our coir bricks have a lower salt concentration than others found on the market which we’ve seen helps with increased colonisation times with bigger flushes and fruits. Often used in conjunction with vermiculite to provide a light and fluffy substrate with good water retention capacities.

1 brick = Approx. 550g-650g

Free Delivery on all orders over £40.

Backed by our 100% Satisfaction Guarantee.

£5 (incl. VAT)

Frequently Bought Together

Scientific Research Papers on Coconut Coir as a Substrate for Mushrooms

12 reviews for Coconut Coir

  1. 5 out of 5

    R Harvey

    Creates an ideal substrate for cubes, can be composted after. It's the outer shell of coconuts, very contamination resistant. I normally hydrate then mix with a bit of Gypsum for some added nutes. Been using this stuff for years as you can do away with expensive lab equipment. Buket tek is best, good yields. Thanks (use boiling water to hydrate then allow to cool, cold water doesn't work as well)

  2. 5 out of 5


    Cheap and good quality

  3. 5 out of 5


    Highly compressed brick of coir. Seems to do the job. I'll update after my first harvest!

  4. 5 out of 5

    Paula Lucas

    Can be a bit dusty if breaking chunks off but to be expected. Fast delivery. No problems.

  5. 5 out of 5


    Hydrate in wheelbarrow and cover. I'm just getting into mushroom cultivation but used to use this stuff to help with my heavy clay soil in garden. Multiple uses. Happy customer

  6. 5 out of 5


    Please with the quality of the product and speed of delivery. Well packaged along with a few other bits I ordered. First class service. Will use again – Colleen.

  7. 5 out of 5

    I grow mushrooms

    Holds a LOT of water! I guess that's why it's used to grow mushrooms! Excited to get growing

  8. 4 out of 5


    shredded coconut husks. that is what I wanted, that is what I got. im leaving this review because they gave me a free cookie and a few samples of other products. otherwise i wouldnt have bothered. peace and luv x

  9. 5 out of 5


    Order arrived promptly. Perfect for mushrooms cultivation with the excess used in the garden for potting up plants. Great water retention. Expands with little effort in water, took around 20 minutes to fully hydrate and break down. Can be hydrated in one go, but I used a rake to break it up and speed up hydration. Can be broken up by hand.

  10. 5 out of 5

    Alex Heath

    Great stuff! Mushies love it. Add boiling water in a tub until you reach field capacity. Hydrates almost instantly. Cover and leave to pasteurise. Mix in spawn when cool approx. 4-6 hours otherwise you will kill the mycelium.

  11. 5 out of 5

    Mel & Steve

    Decent sized brick of coir, well packaged, speedy delivery, can be sawn up to size. – Thanks

  12. 5 out of 5

    O. Curd

    Light and fluffy growing medium. EAsy to hydrate. I ordered more than needed as it keeps indefintely and can be used in my greenhouse too. great for strawberries and ends up in my worm farm after mushroom harvest.

Add a review

Free Mushrooms

100% FREE Mushroom Giveaway


FREE P&P | No Purchase Necessary | One Per Household.

Send Me Some Mushrooms!

Free Mushroom Selection Box

A selection of our finest organic dried mushrooms

No catches, we'll send one to you a dried gourmet mushroom selection box for free, we'll even pay the postage.
Why are they free? We just want to let you sample our mushrooms, if you like them, (which we're sure you will!), you might want to buy some more from us in the future.