What is Coco Peat? Benefits, How to Prepare & Use Coco Peat

Coco peat is the soft, spongy pith sieved from coconut husk and sold as loose peat, compressed bricks or discs. It holds water well, keeps potting mixes light and drains freely. Rinse it, buffer it with calcium and magnesium, then mix it with soil and compost rather than using it alone.

Quick facts

Point	Detail
What it is	Pith (dust) sieved out of coconut husk during coir fibre extraction; also sold as coir pith or coco coir peat
pH	Usually 5.5-6.8 (slightly acidic to near neutral)
Water holding	Holds roughly 8-10 times its own weight in water and rewets easily
Nutrients	Very low in nitrogen and phosphorus; naturally high in potassium and sodium. It is a growing medium, not a fertiliser
Salts	Unwashed peat can be salty; rinse and buffer with calcium and magnesium before planting
Typical mix	About one-third coco peat with soil and compost for pots; 100% for seed trays
Best uses	Seed starting, potting mixes, soil conditioning, mulch, hydroponics, terrace and balcony pots
Storage	Keep blocks dry and sealed; hydrated peat stored damp can grow mould, especially in the monsoon

What is coco peat?

Coco peat is the non-fibrous, spongy, corky material that binds the coir fibres inside a coconut husk. It is a by-product of coir fibre extraction, and its horticultural value was recognised in the early 1990s. India and Sri Lanka are among the world's main producers, which is why it is cheap and widely available here.

It is fully organic and biodegradable, and it can be reused after rinsing and draining. Compared with garden soil, coco peat holds far more water and releases it slowly to roots, while staying open enough for air to reach them.

Feeding plants grown in coco peat

Coco peat carries almost no plant food of its own, so anything growing in a coco-heavy mix has to be fed.

How often should you fertilise plants in coco peat?

Feed once every 15-20 days in the growing season, using a balanced water-soluble fertiliser such as NPK 19:19:19, since a small pot of coco peat leaves little room for bulky vermicompost.

Usage of NPK 19:19:19: dissolve half a teaspoon (3-5 g) in 1 litre of water and pour the solution into two 8-inch pots.

Because coco peat naturally holds potassium and sodium and readily swaps out calcium and magnesium, also give a calcium-magnesium supplement (or a fertiliser that contains both) every few feeds. Yellowing between the veins of new leaves is the usual sign that magnesium is short.

Useful facts about coco peat

• It absorbs a great deal of water. A 1 kg compressed block typically expands to around 12-15 litres of damp, usable medium.
• It holds moisture for days while still draining, so pots need watering less often than pots of plain soil.
• It keeps potting mixes loose and aerated, which suits root growth.
• It is compressed to a fraction of its volume for transport, so it is cheap to ship and easy to store.
• It is low in nutrients. Treat it as a growing medium that you feed, not as a compost or manure.
• Fresh, unwashed pith can carry sodium, potassium and chloride salts from processing; good suppliers wash and buffer it.

Properties of coco peat

• Lightweight, clean to handle and reusable for a season or two if it is rinsed and not compacted.
• Slow to break down compared with compost or leaf mould, so it keeps its structure in a pot for a long time.
• pH of about 5.2 to 6.8, which makes it useful for opening up alkaline garden soil.
• High cation exchange capacity, so it holds nutrients and releases them gradually.
• Good oxygen-holding capacity between the particles, which roots need.
• Mixes readily with garden soil, compost, sand, perlite and manure, or works on its own for germination.
• Uniform in texture and does not turn to mud or set hard like clay soil.
• It is not sterile or immune to fungi. Kept soggy, coco peat can grow surface mould and breed fungus gnats, so let the top layer dry between waterings.

How to make coco peat at home

If you have coconut husks to spare, you can make small quantities yourself:

1. Collect coconut husks and dry them fully in a well-aired spot.
2. Pull the fibres apart and let them dry completely.
3. Chop or cut them into small pieces with scissors or a cutter.
4. Grind the pieces to a coarse powder in a mixer grinder.
5. Sieve the powder to separate the pith from the fibre.
6. Lift the leftover fibre off the top of the sieve by hand and keep it for drainage layers.
7. Rinse the pith with water to wash out excess salts.
8. Soak it for about an hour, then drain.
9. Squeeze out the extra water and dry it in the sun for a day.
10. Store it dry, or moisten and fill your pots and trays with it.

A realistic note: home grinding gives a coarse, fibrous product and small yields. For anything more than a few pots, buy coco peat from a garden store or online seller and follow the instructions on the pack.

How to use coco peat

1. As a stand-alone growing medium or substrate in greenhouses and hydroponics, with a full nutrient feed.
2. As a soil amendment, to improve texture, aeration and moisture retention in heavy or sandy soil.
3. As a renewable substitute for peat moss, which is dug from slow-forming bogs.
4. Composted coco peat can be added to beds as organic matter.
5. To improve the moisture holding and buffering of any potting mix.
6. For seed germination and seedling trays, where it holds steady moisture without crusting over.
7. As a light base for terrace and roof gardens, where weight matters.
8. As a surface mulch on pots and beds to slow evaporation in the summer.

How to prepare coco peat soil at home

1. Take a compressed coco peat block or brick.
2. Half fill a large bucket or tub with water and place the block in it.
3. Leave it to soak for 3-4 hours so it takes up as much water as it can and loosens.
4. Break up any hard core with your hands as it swells; the block will expand many times over.
5. Drain the excess water and squeeze lightly. You now have soft, fluffy, damp coco peat, ready to rinse and mix.

Coco peat mixing ratios

Coco peat works best as part of a mix. Use these ratios by volume as a starting point and adjust for your climate: use a little less coco peat in humid coastal and monsoon conditions, a little more in dry north Indian summers.

What you are growing	Suggested mix (by volume)
Indoor foliage and houseplants	35% coco peat, 40% garden soil or potting soil, 25% compost, plus a handful of perlite or coarse sand per pot
Succulents and cacti	20% coco peat, 60% coarse sand or grit, 20% compost. Keep it gritty so it dries fast
Seed starting and cuttings	80-100% coco peat, with up to 20% perlite or vermiculite. Feed lightly once true leaves appear
Bonsai	10-20% coco peat with 80-90% inorganic grit such as akadama, baked clay, pumice or coarse river sand. Too much peat holds water and rots fine roots
Vegetables in grow bags and terrace pots	30% coco peat, 40% soil, 30% compost or vermicompost, topped up with feed every fortnight
Hydroponics and soil-less pots	70% coco peat, 30% perlite or coco chips, buffered, with a complete nutrient solution at every watering
Improving garden beds	Fork in a 2-3 cm layer of coco peat over the bed before planting, along with compost

For a deeper look at bonsai media, see how to make your own bonsai soil.

How to rinse and buffer coco peat

Coconuts often grow near the coast, so the pith can hold sodium and chloride, plus a lot of potassium. Unwashed peat can scorch seedlings and lock out calcium and magnesium. Two simple steps fix this.

1. Rinse out the salts

1. Expand the block, then tip the wet peat into a bucket or a mesh bag.
2. Flush it with clean water, stirring as you go, and let it drain.
3. Repeat two or three times until the run-off is clear rather than tea-coloured. If you have an EC meter, rinse until the run-off reads close to your tap water.
4. Use filtered or RO water for the final rinse if your tap water is very hard or brackish, which is common in parts of Delhi NCR, Rajasthan and Gujarat.

2. Buffer with calcium and magnesium

1. Dissolve a calcium and magnesium supplement in water, following the label; a common home recipe is roughly 1 g calcium nitrate and 1 g magnesium sulphate (Epsom salt) per litre.
2. Soak the rinsed peat in this solution for 6-8 hours, or overnight.
3. Drain it without rinsing again, and use it.

Buffering fills the peat's exchange sites with calcium and magnesium, so it stops stripping those elements from your fertiliser. Skip this only if the pack says the product is already washed and buffered.

What is coco coir?

Coir is the fibre from the coconut husk, and the word is also used as an umbrella term for all husk-based media, including the pith. In the trade, coir fibre and coir chips are the coarse, stringy grades, while coco peat is the fine pith. Coir fibre can be added to potting mixes, used in hanging-basket liners and moss sticks, or used as a hydroponic medium.

Pros

• Excellent drainage and air-filled porosity.
• Works outdoors and indoors, and resists compaction better than peat moss.
• Mixed into heavy clay soil, it improves drainage and airflow.

Cons

• It holds much less water than coco peat, so containers dry out faster.
• It holds fewer nutrients, so plants in pure fibre need more frequent feeding.

What is the difference between coco peat and coco coir?

Raw material: Both come from the same coconut husk. Coco peat is the fine pith sieved out of it; coir is the long fibre.

Drainage and aeration: Coco peat holds more water, which suits thirsty plants and seedlings. Coir fibre and chips drain faster and hold more air, which suits orchids, aroids and plants that hate wet feet.

Cation exchange capacity: The fine pith has the higher cation exchange capacity, so it holds nutrients better; coarse fibre holds fewer.

Texture: Coco peat is fine, light and fluffy. Coir is coarse and stringy.

Colour: Both are brown. Coco peat ranges from light golden brown to dark brown; coir fibre is usually a redder or paler brown.

pH: Both sit in much the same range, about 5.5 to 6.8.

If you are comparing coir with traditional peat, read peat moss vs coco peat.

Similarities between coco peat and coco coir

• Both are by-products of the coconut industry and are renewable.
• Both can be used as a potting ingredient, a soil improver or a stand-alone growing medium.
• Both are valued as alternatives to mined peat moss.
• Both keep their structure far longer than compost or leaf mould.
• Both are low in nutrients and need regular feeding.

Different forms of coco peat

1) Loose coco peat

Loose, ready-hydrated coco peat is sold at most nurseries and online. Buy from a reputable source, since cheap material is sometimes bulked up with sand or sold unwashed and salty.

How to use coco peat in gardening

a) Container gardening: mix equal parts soil, compost and coco peat, or use about 35% coco peat, 40-45% soil and 20-25% compost. A straight 1:1 coco peat and compost mix works, but nutrients leach quickly, so adding soil is better.

b) Garden beds: fork coco peat gently into the planting area to improve structure and add organic matter.

c) Germination: use coco peat on its own in seed trays as a seed-starting mix.

d) Bedding: it works as bedding or substrate in vermicomposting and mushroom growing.

e) Mulch: spread a layer on the surface of pots, beds and compost heaps to slow moisture loss during the summer.

2) Compressed bricks

Pith and short fibres are pressed into hard blocks of various sizes, so a lot of medium fits into a small space. Soaking a block until it breaks apart is called reconstitution.

Reconstituting a coco brick:

• Place the brick in a large tray or tub and pour water over it slowly, turning it so both sides wet through.
• Let it rest for 5 to 6 minutes.
• Keep adding water to the dry core while raking off the swollen peat, until the whole brick has expanded.
• Add water until the peat is evenly damp but not dripping, following the product instructions.

Note: depending on the grade, a brick can expand to many times its compressed volume; a 5 kg block commonly yields 60-75 litres of damp peat.

3) Seed starter coco discs

Coco discs or pellets are made for germination. Coco peat, sometimes blended with potting mix, is pressed into flat discs that swell when soaked. They are wrapped in netting or soft woven cloth that holds the peat together, and the whole disc goes into the ground at transplanting, since roots grow straight through the mesh.

4) Coir pots

Coir planters are moulded and pressed into pot shapes and come in many sizes, like plastic or ceramic pots. They break down in the soil, so you can plant them out whole. Browse our ceramic pots if you want a longer-lasting option indoors.

5) Coir mulch mats

Coir pressed into mats makes mulching simple. Lay a mat on the soil surface around the plant to hold moisture in; the mats are porous, so you can water straight through them.

6) Coco chips

Coco chips are chunks cut from the husk, sold in several grades. They are mainly used as mulch, and in potting mixes to add aeration and drainage. They are especially useful for orchids and for plants that rot in a wet mix.

7) Coir planter liners

Liners are made from layers of thick coir fibre pressed together to keep soil in place. They fit wire baskets and window boxes.

8) Coir planting poles

Moss sticks and climbing poles wrapped in coir fibre support money plant, monstera and other climbers. Kept damp, they hold moisture for the aerial roots as well as supporting the plant.

Coco peat benefits

1. It increases the porosity of a potting mix, keeping it loose and airy so roots spread freely.
2. It raises water-holding capacity at the same time, which smooths out the gap between watering days in summer.
3. It rewets easily. Unlike dried-out peat moss, dry coco peat takes up water quickly.
4. It compresses to a fifth of its volume or less, cutting transport, storage and handling costs.
5. It is biodegradable and made from a waste stream of the coconut industry.
6. Its high cation exchange capacity means it holds nutrients you apply and releases them gradually.
7. It comes in many grades and shapes, from fine pith to chips, so you can tune drainage.
8. Blended with coconut husk chips, it gives the same water-holding with better drainage.
9. It is lighter than soil, which matters for balcony railings, terrace gardens and hanging baskets.

Coco peat disadvantages

1. It can contain natural salts. Unwashed material needs rinsing, and your feeding programme has to account for the potassium and sodium already present.
2. It locks up calcium and magnesium unless it is buffered, which shows up as pale or yellowing new growth.
3. It holds almost no nutrients of its own, so plants depend entirely on what you feed them.
4. Recirculating hydroponic systems need care, as salts released from the medium shift the nutrient balance.
5. Very old, tightly compressed blocks can be stubborn to rewet. Store blocks dry and sealed, and use them within a year or so.
6. Fine peat alone is light and gives little anchorage, so tall plants need staking.
7. Kept constantly wet, especially through the monsoon or in a low-light AC room, it invites surface mould and fungus gnats. Let the top 2 cm dry out between waterings.
8. Quality varies widely between suppliers; poorly processed peat may carry excess salt or contaminants.

Using coco peat through the Indian year

• Summer (March-June): coco peat earns its keep. A third of coco peat in terrace and balcony pots can halve how often you water in the north Indian heat. Add a surface mulch of peat or coir chips.
• Monsoon (July-September): cut back on coco peat in new mixes, or add extra sand and perlite, because pots stay wet for days. Move pots under cover and keep stored blocks dry and sealed.
• Winter (November-February): growth slows, so water less and stop or reduce feeding. In the humid coastal south, the medium stays damp for longer than in dry Delhi winters.
• AC rooms: the air is dry but evaporation from the pot is slower than on a balcony, so check with a finger before watering rather than following a fixed schedule.

Conclusion

Coco peat is a dependable, renewable growing medium: light, water-retentive, easy to rewet and easy to store. Buy washed and buffered material from a supplier you trust, mix it with soil and compost rather than using it alone, feed regularly, and add grit or chips wherever drainage matters. If you have a question about mixes for your plants, get in touch with us.

Related articles

• Peat moss vs coco peat: what's the difference?
• How to make your own bonsai soil for healthy bonsai
• Browse plants at Abana Homes

Frequently Asked Questions

Can you grow plants in coco peat alone?

Not for long, unless you feed them. Coco peat holds almost no nutrients, so plants in pure peat need a complete liquid fertiliser at every or every other watering. For seed germination and cuttings, though, coco peat on its own works very well.

What is the right coco peat to soil ratio?

For general potting, use about 35% coco peat, 40-45% garden or potting soil and 20-25% compost. Succulents need less peat and more grit; seed trays can be almost pure peat; bonsai needs only 10-20% peat with mostly inorganic grit.

Do you need to wash coco peat before using it?

Yes, unless the pack says it is pre-washed and buffered. Flush the expanded peat with clean water two or three times until the run-off is clear, then soak it for 6-8 hours in a calcium and magnesium solution so it stops stripping those nutrients from your feed.

Can coco peat and compost be mixed 1:1?

You can, and plants will grow, but nutrients leach quickly from such an open mix. A blend of soil (35-40%), compost (20-25%) and coco peat (35%) holds nutrients better and gives roots more anchorage in the pot.

What is the pH of coco peat?

Coco peat usually sits between 5.5 and 6.8, slightly acidic to near neutral, which suits most houseplants, vegetables and bonsai. That mild acidity also makes it useful for loosening and balancing the alkaline soils common across much of northern India.

How long does coco peat last and can it be reused?

Dry compressed blocks keep for a year or more if stored sealed and away from damp. Used peat can be reused for a season or two: shake off old roots, rinse it well, mix in fresh compost, and discard it if it smells sour or has compacted.

Is coco peat good for indoor plants?

Yes, as part of a mix. About a third coco peat keeps indoor pots light and evenly moist, which helps in dry AC rooms. Keep the mix well drained and let the surface dry between waterings, or you will invite fungus gnats.

What is the difference between coco peat and coco coir?

Both come from coconut husk. Coco peat is the fine pith, which holds a lot of water and nutrients. Coir is the coarse fibre, which drains faster and holds more air. Many growers blend the two, or add coco chips, to balance water and drainage.

Sources

• Royal Horticultural Society, plant and growing media advice: rhs.org.uk/advice