Coconut Coir Brick


  • Great for the worm bin
  • Coir lasts longer in soil than peat moss
  • Coir is quickly and easily renewable
  • Coir is naturally free of bacteria, plant disease, fungal spores, weeds, seeds and pathogens.
  • Coir’s neutral pH of 5.8–6.8 allows it to efficiently release nutrients to plant roots and reduces the need to use dolomite lime in the garden.


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Coir is a natural fiber extract from coconut husk. The Coir fibers are extracted from between the outer shell and hard internal shell of the coconut. The fibers are then screened, graded, washed and compressed into bricks. Coir has many applications but is especially useful for gardening as an alternative to peat moss.

  • 100% natural, renewable replacement for peat moss, rockwool & perlite
  • Compressed bricks are easy to handle and store
  • This disease resistant / pH balanced growing medium provides excellent air space and water holding capacity
  • Holds between 8 & 10 times its volume in water
  • Each brick yields 0.125 cubic feet of growing medium (1.4 pound size) 
  • Compressed Brick expands to 2 to 2.4 Cu.Ft after hydration (11 pound size)
  • New box contains : 1 x 1.4 pound or 11 pound Coconut Coir Brick

Water Holding Capacity

A compressed coco coir brick, block or bale should be soaked in water for at least 1 hour before using. Coco coir fibers expand 5 to 7 times in volume when soaked in water. Because of its superior water holding capacity, coir has excellent air space and drainage. When used in sandy soils, coconut coir fibers help to keep nutrients and moisture close to plant roots instead of washing away. When used in clay soils, coco coir brick helps to break up hard-packed earth and move nutrients and moisture through the soil.


Coconut coir is a bedding material used for the worms. This bedding provides a comfortable environment for worm life, creating an ideal burrowing environment that is neither too dry nor too damp. Worms need bedding to thrive and break down the food matter they’re given. Coir works well because it holds moisture without becoming hard and compacted. It’s completely natural, meaning you’re not introducing chemicals that might affect the worms or the castings they produce. Coir is processed and sold in brick form.

To use coir as worm bedding, first soak the coir in water and squeeze out the excess, like a damp sponge. Fill the worm composting bin three-fourths full with coir or a combination of coir and shredded paper or corrugated cardboard. A suitable worm composting bin allows air circulation and has small holes on the bottom and sides, as well as a lid to keep the worms inside. Bricks keep the bin off the ground to allow matter to flow out the bottom. Add a handful of soil to the coir. The soil’s gritty texture aids the worms’ digestive process. Place the worms atop the coir and let them burrow and get used to their surroundings for a few days. Set a piece of damp cardboard or paper on top of the bedding after adding worms.

Additional information

Weight 1.45 lbs
Dimensions 7.3 × 7.2 × 1.6 in

1.4 pound brick, 11 pound brick

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4.9 Based on 137 Reviews
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Filter Reviews:
John G.
Exactly what was advertised. Excellent quality!!!!!

While new to the world of vermicomposting… I will definitely be a returning customer to Uncle Jim’s Worm Farm!

Matthew M.

Great quality!

Mark G.
Coconut Coir Block 11lbs

The coir worked out great just as we anticipated. Great price for the 11lbs blocks.. Great deal.. Will get more..

The coir really helps

Uncle Jim has all the accessories for my worm bin. But more importantly, he is very helpful with advice and any questions you might have. Thanks, Uncle Jim!

Happy customer

Been a new "worm keeper" for 8 months. First attempt at starting worm farm in February was a terrible disappointment due to original shipment (not Uncle Jim's) of worms was delivered to wrong place and could not get a reply in 3 weeks! Ordered new worms from Uncle Jim's and received them promptly after tracking package the whole time. Really like an operation that holds themselves accountable!! So when I needed to change my bedding around a bit (with great success) I purchased from Uncle Jim's. Will continue to do business with Uncle Jim's for all my worm farming needs!!

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