Coco-Fiber Planting Medium

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  • 1 - 2: $9.99 Each
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Item #H16984, 1.4 Pound Brick.
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The perfect sterile growing medium. Use this expandable brick of all-natural coconut fiber (coir) to enhance your soil, making it easy for plants to stretch out their roots. Loosens hard clay soil and adds water-retaining fibers to sandy soil. Resists compacting and remains porous for air circulation. Made from coconut husks. Expands to over 2 gallons when you add lukewarm water as directed. Each brick breaks down into enough coir medium for approximately 4 trees.

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Questions & Answers

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Browse 31 questions Browse 31 questions and 110 answers
Why did you choose this?
Stark Bro's Store
High clay content/sandy substrate in the area I wanted to plant a few black raspberry varieties. Picked this up to mitigate that barrier to growth.
Dylan I on May 9, 2021
I have clay soil; should help
D Goddess on Apr 15, 2021
High clay content/sandy substrate in the area I wanted to plant a few black raspberry varieties. Picked this up to mitigate that barrier to growth.
Dylan I on May 9, 2021
Favorite for raising worms and cheaper at Starks!
Dave on Apr 24, 2021
I have clay soil; should help
D Goddess on Apr 15, 2021
Previously have used it in planting my fruit trees to improve poor soil quality. It worked wonders
Homer J. on Apr 13, 2021
to break up clay soil
Christopher C on Apr 12, 2021
we have clay soil
D D on Mar 22, 2021
to break up my heavy clay soil for my new trees.
sue c on Mar 21, 2021
It will be easier than carrying 7 big bags of soil out to my garden.
Marilyn M on Mar 20, 2021
Your suggestion
Mike C on Mar 20, 2021
Clay Soil, needs softening
DAVID S on Mar 19, 2021
Use before enterance hard place Royal into manageable softe soil for planting
Michael P on Mar 10, 2021
Improvements of to Yield for my young apple and peach frees
Rebecca B on Mar 5, 2021
heavy clay soil. I have lost all but one cherry tree and I've planted them 2 or 3 times.
Deborah C on Feb 21, 2021
I have clay soil and would like a more sustainable product than peat moss to improve drainage
Susan H on Feb 11, 2021
Coco fiber is the only media that will retain and hold water during hot days in the desert! A must for blueberry bush's
Anthony P on Feb 5, 2021
To loosen heavy soil.
Joseph Z on Jan 31, 2021
Honestly? Because I only needed $7 to hit free shipping and this was the cheapest thing I found on the web site. I do start seeds indoors so it won't be wasted.
Sweet Jane on Jan 30, 2021
Good reviews.
Ron on Jan 24, 2021
seed starting; planting
Jocelyn H on Jan 17, 2021
To propagate Papayas.
Gregory J on Nov 15, 2020
Need as soil suppliment
Terry G on Oct 27, 2020
Definitely will aid my clay soil
Susan T on Oct 13, 2020
Anything to help
S N on Sep 16, 2020
Awesome way to stabilize my otherwise sandy soil.
Angela A on Aug 26, 2020
My soil has heavy clay. This should help loosen it.
Brenda B on Aug 24, 2020
Lead Farmer73 suggested it when planting fruit trees.
Donna P on Aug 20, 2020
Recommend to me as a good product.
JULIE B on Mar 30, 2020
my soil is clay-ey as you put it. This should help.
Samuel H on Mar 25, 2020
I need something to loosen up my soil.
Farnklin Y on Mar 23, 2020
Want to give it a try
Dean M on Mar 23, 2020
It was recommended
Sheri C on Mar 22, 2020
recommended for banana plant
Karen S on Mar 12, 2020
For root systems
Terry J on Mar 6, 2020
Have very sandy, hard ground.
MICHELLE F on Mar 1, 2020
Need it
Janine T on Feb 7, 2020
can't hurt to try
EDWARD T on Jan 30, 2020
it was suggested inorder
DON K on Jan 19, 2020
just need it
Linda K on Jan 9, 2020
it is quick soil mix
Charles W Coles C on Jan 6, 2020
Repotting fir tree and potting annual plants
Don S on Oct 19, 2019
Looked as if it might help with soil
John S on Oct 1, 2019
bought in Threes as great price, and nice medium to grow in especially started out the 5 new trees I just bought
Randall W on Sep 24, 2019
Worked well in the past
Lindsay M on Aug 15, 2019
Because it said it would help my clay soil.
Debra C on Jul 14, 2019
As suggested.
Bonnie on Jul 7, 2019
I have used this product before and I believe it makes a real difference when planting.
Cynthia H on Jun 28, 2019
To help with clay soil
Shufreda C on Jun 24, 2019
have used before and it is WONDERFUL!
Margaret C on May 31, 2019
Our soil is full of slate and clay and it needs more organic matter. I am guessing that coco fiber is more environmentally friendly than peat moss, which I usually use.
Alice H on May 30, 2019
Recommended by you, and I have clay soil.
Gerard D on May 11, 2019
Favorite for raising worms and cheaper at Starks!
Dave on Apr 24, 2021
Previously have used it in planting my fruit trees to improve poor soil quality. It worked wonders
Homer J. on Apr 13, 2021
will this help keep a raised bed damp enough for tomatoes?
John S on Sep 12, 2016
BEST ANSWER: I live in the desert southwest and these are great to keep roots moist
Are you supposed to crumble these bricks or what?
Araceli D on May 17, 2016
BEST ANSWER: If you soak it in water it will separate into a nice medium. Let it sit in hot water 15-30 minutes.
We ordered 6 trees and six coco fiber bricks. Is it ok to use 1 brick per tree? The soil is hard limestone. I dug a 3x3 foot 18" deep hole for each
Dennis S on May 5, 2016
BEST ANSWER: It really does expand as described, which amazed me and it is peat-like when moistened. One brick per tree is a good start but I would add in some compost, organic top soil or garden soil as well. Remember that much organic material that you add to native soil will eventually degrade so give those trees a good start. Don't just plant the tree directly into the coco fiber/compost: thoroughly mix it with equal amount of native soil. Good luck!
Can it be used for tomatoes, peppers, cabbages it squash ( tuberous plants like sweet potatoes)? In Colorado the clay soil is difficult to break down. I've added 2-3 inches a year and can only till down that far each spring.
Marilyn H on Oct 10, 2016
BEST ANSWER: Coco-Fiber Potting Medium improves the soil for ANY kind of plant. It is pH-neutral and will not affect the acidity/alkalinity of the soil. It does a wonderful job of loosening clay soil.
I am considering this for my fall garlic planting. All questions and reviews thus far relate to trees. How is this used in a prepared garlic bed?
Homer J. on Sep 12, 2016
BEST ANSWER: Thank you for your question. You would use this the same way as you would for tree-planting. It is an excellent soil amendment. Well-drained/aerated soil makes garlic bulbs bigger and a little sweeter, and they will be much easier to dig up when it's time to harvest them.
Do you soak the coconut fiber in water before adding it to the soil?
Janet C on Sep 12, 2016
BEST ANSWER: Yes you do add the water it tells you to in the directions. And mix it and break it up in a 5 gallon bucket, it will expand to fill the whole bucket. Then add it to the soil. Pretty neat stuff!
Does this smell sweet like Coconut or does it smell like hay?
Teresa F on Apr 28, 2016
BEST ANSWER: In my opinion, it does not smell like coconut. Now, when I order trees ??? it is common for me to receive about 30 trees at one time to plant so I'm not really focused on paying attention to what the Coco fiber smells like. However, I am sure if it did smell like coconut, I would have noticed that.
Just how will it help my clay soil?
Old Gardener on Nov 21, 2019
BEST ANSWER: It has been great for my clay soils for all of the trees and plants I have used it on.
It loosens the compaction to allow water to get to the roots and for easier growth. It also stays moist long after a rain or watering event.
Can I use it in a pot?
nabaala c on Jun 3, 2018
BEST ANSWER: I used them for planting fruit trees. But I think they would be a great addition to the soil you use in a pot. It would help with water retention and keeping your potting medium light. It really expands when wet, so soak it first according to directions. That way you can use the proper ratio to potting soil. Happy planting!
Is the coco fiber good to use on top of the soil like mulch?
Robin G on Sep 19, 2016
BEST ANSWER: The fiber becomes quite wet when the instructions are followed. It would be hard to use as mulch but works well as a potting medium.
How do you add it to the soil of existing trees?
Darlene B on Mar 10, 2021
BEST ANSWER: Soak it in hot/warm water and let it soak for 15 minutes (instructions included with purchase). It will be thick and pourable. Work it into the soil around the tree. If soil is loose, remove the top soil and then pour around the tree and replace the top soil. Mulch can be added after treatment. Don???t pour on top of mulch.
Is this just for trees or can it also be used with berry plants?
Marcia J on Aug 29, 2020
BEST ANSWER: Works great for berries too (blueberries in particular).
Sharon R on Mar 22, 2020
BEST ANSWER: I used these fiber bricks in my large pots and a small bed. They were wonderful for holding the moisture. I was very satisfied with these.
Do you sell a bigger size brick of coco fiber?
Joeseph E on Apr 13, 2021
BEST ANSWER: No unfortunately it only comes in one size which is a 1.4 Pound Brick.
Can you use the coco fiber for citrus trees?
MsCarla on Nov 24, 2020
BEST ANSWER: Yes, you can use coco fiber for planting all fruit trees.
Should this be used in clay soil? I heard one should not amend soil because the tree roots would just stay in the dug hole and ball up instead of spreading. Is this true?
Bonny A on Oct 20, 2020
BEST ANSWER: This can be used in clay soil with out an issue.
Can you use on small trees that are already planted?
Edwin O on Aug 29, 2020
BEST ANSWER: Cocoa fiber is meat to be used when planting a tree. I Believe it is used to help hold moisture near the roots of the tree.
Will I need this to plant my Turkey Fig tree?
Marlene P on Jul 11, 2020
BEST ANSWER: We appreciate you reaching out to us. This product is recommended for all planting of fruit trees.If you have any further questions please don't hesitate to reach back out to us. Have a great day!
I am going to re-pot some of my house plants. Instead of using the expensive indoor potting soil, can I use some the Coco fiber to mix with the regular potting soil to lighten it up? Would it work?
Chris H on Mar 6, 2020
BEST ANSWER: Will work great. I have used coco fiber with anything at my farm. All vegetables. Blueberries and strawberries. All 20 of my fruit trees have had coco added to the root ball. That was 3 years ago and all plants are doing great. Good luck!!!
How do I use coco fiber brick to plant?
Suzanne H on Feb 17, 2020
BEST ANSWER: We appreciate you reaching out to us. You'll soak the brick in lukewarm water and it will expand over 2 gallons. This turns into a workable fiber that you will mix in with your soil or potting mix. Each brick breaks down into enough coir medium for approximately 4 trees.

If you have any further questions please don't hesitate to reach back out to us. Have a great day!
what do you mean by 4-10-3?
celso b on Feb 1, 2020
BEST ANSWER: Inches it is the brick measurement. 4 inches by 10 inches by 3 inches.
What is the weight of the coir soil when wet? calculate for roof top planting.
Retta F on Jul 29, 2019
BEST ANSWER: The dry brick weighs 1.4 pounds and holds 8-9 times its weight in water, so the total weight for one fully saturated brick would be 11.2 - 12.6 pounds.
Can you show me how you actually would plant a tree using coco fiber blocks?
Tenia R on Oct 26, 2018
BEST ANSWER: Yes, indeed. This is a little older video, so the soil amendment is called Coco-Fiber Potting Soil, but it is the same thing as our Coco-Fiber Planting Medium. Here's a link to the video: //
how much of a brick do you pet per cubit feet of potting mix?
mickey on Mar 24, 2018
BEST ANSWER: First, prepare the brick by soaking it in warm water according to the package directions. Then mix the finished coir about 1 part to 2 parts soil. The difference is quite amazing.
If I add water to break this down, but don't use it all, can I let it dry and reuse it later?
Corinth T on Apr 15, 2017
BEST ANSWER: Yes, you can. Be sure to let it dry out completely - if you seal it up for later use and it's still damp, it will grow mold/compost itself.
I have 2 square foot garden plots (4x4). I would like to use the brick in each plot. One bed I will plant from vegetable seeds; the other bed will be vegetable plants. Can I just use the brick or do I need additional supplies? I reside in Southern California.
Sharon G on Mar 14, 2017
BEST ANSWER: You should always do a soil test to see the level of nutrients and the acidity/alkalinity of your soil. That will be your guide in determining what your soil needs. The coir fiber is an excellent soil amendment no matter what your nutrient levels and soil pH are. We have a soil test kit here: //
Can I use this on pine trees? And does it come with instructions?
Fishy on Jan 26, 2017
BEST ANSWER: It's pH-neutral, so you can use it with any tree or plant. It does come with instructions.
Does the coconut fiber alter the soil Ph?
Lourenco P on Nov 7, 2016
BEST ANSWER: Thank you for your question. No, it does not. It's completely neutral.
If I don't need the entire amount of medium this fall, can I save the remainder until spring (after it has been hydrated from the brick form)?
Laura S on Nov 7, 2020
How to use the coco bricks when planting new fruit trees? Red pear & alberta peach?
Justine on Mar 8, 2020

Customer Reviews

4.7 / 5.0
30 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Really great stuff!
So far I've used the CocoFiber potting medium with two apple trees and a bush cherry and all three are thriving. Where I live, it is extremely sandy soil and I have had difficulty getting any kind of fruit trees (or even vegetables for that matter) to thrive. I truly believe my happy apple trees are due to this potting medium. I will continue to use it from now on when planting.
May 14, 2016
over 5 years ago
First But Certainly Not Last
This was the first time I had ordered the cocofiber. It will not be the last! I love this stuff. It hydrates quickly, mixes with the soil well and very easy to use. I used one brick for every two trees. The trees must like it too because the are leafing out.
April 18, 2016
over 5 years ago
Works great in breaking up clay
Helps really well to keeps the soil loose for the roots. Ive been using this product for years and wouldn't do it any other way.
May 10, 2017
over 5 years ago
This was really fun to work with for the trees. My friend's kids were over and helped with this part. They loved to see the fiber expand. It worked great and it seems to have made a great impact on the roots as well.
July 1, 2016
over 5 years ago
A real value
I got several bricks of this material and believe they are responsible, in part to the excellent start my trees had. We have very sandy soil and anything that helps hold moisture as these trees are getting started is good. Based on tree growth and vigor, I would say this is the best stuff I have come across to do that job.
June 8, 2017
over 5 years ago
CocoFiber Potting Medium
This is a miracle addition to any garden. Our garden was absolutely beautiful!
May 4, 2016
over 6 years ago
Great To Start Your Tree
This material was easy to use and did what it was supposed to do.....Started the tree off, growing like mad.....
May 23, 2016
over 5 years ago
CocoFiber Potting Medium
I loved this product and really made a difference in tree planting from a pot to the garden.
August 30, 2016
over 4 years ago
CocoFiber Planting Medium
Used this as recommended for the planting of my Fruit Trees. I think it makes a difference. Especially if there is even a slight amount of clay in your soil where planting. Will Use it again with additional plantings.
May 12, 2017
over 4 years ago
Coco Fiber Planting Medium
I had a bit of a difficult time getting the right mixture, but once I did it worked well. I used it for my fall garlic planting. It will be interesting if this works up again for another planting, or if I will need to re-order.
September 28, 2016
over 4 years ago