50 L bag of coco fibre with perlite, front view

Three-quarter view of a pure coco fibre bag, with labels and volume clearly visible

Three-quarter view of coco fibre and perlite bag, orange band

50 L coco fibre, natural or with perlite

Name: 50 L coco fibre, natural or with perlite
Brand: Terra Aquatica
SKU: TA-SUB-COCO-50
Availability: InStock

$28.00

Coco fibre is a soilless grow medium that retains water like a sponge whilst allowing air to pass through. This 50 L bag can be opened and used straight away.

You can choose between two compositions. The natural fibre retains more water, while the fibre blended with a quarter perlite drains more quickly.

Composition : Coco pure

Coco pure

Coco et perlite

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The summary

What it is: a 50 L bag of coco coir, a clean soilless grow medium that can be opened and used straight from the bag.
Two blends: the natural coir retains more moisture, while the blend cut with a quarter perlite drains more freely.
You control the nutrition: fertiliser is applied with every watering, using a formulation designed for coco coir.
Reusable: rinse the grow medium between crops and it is ready for another cycle, up to three times in total.
Bag weight: 12.5 kg for natural coir and 10.6 kg with perlite, which is lighter.
pH: your nutrient solution sets the pH of the growing environment, and you read it from the drainage water.

Growing medium 50 L, natural coconut fibre or with perlite

Coco coir is a by-product of the coconut industry that has, over the past thirty years, become the main alternative to peat in soilless growing. It retains water like a sponge whilst still allowing air to pass through, it breaks down slowly, and it requires no draining of a peatland to produce, which is precisely the argument that won over much of the industry.

💧 Water and air in the pot

A root needs water and oxygen at the same time, and that is precisely what coco fibre delivers. Its fibres retain available water for hours while still leaving air channels between them. You can water coco that has dried out without it repelling water, unlike dried peat, and you add nutrition through the irrigation water, which gives you full control over what the plant receives at every stage of growth.

🪴 Natural or with perlite

Retention

The fibre behaves like a sponge. It keeps water available for a long time and forgives a missed watering.

Aeration

The fibre allows air through as long as it is not compacted. A compressed grow medium loses this advantage.

Nutrition

You add the fertiliser to the irrigation water and adjust the formula to suit the plant's growth stage.

Reuse

The fibre can be reused over three growing cycles. Between uses, a thorough rinse restores it to its original condition.

Perlite is an expanded volcanic rock, in the form of white, porous, incompressible beads. Mixed in at a quarter ratio, it prevents the fibre from compacting and maintains air pockets even when the grow medium is saturated. The mix can then handle frequent or slightly generous watering, whereas natural fibre alone will eventually become waterlogged. Choose the natural fibre if you water by hand and infrequently, and the perlite version if your watering is frequent or automated.

Compacting, watering, rinsing

Do not compact the grow medium when filling the pot, as the fibre will lose its air channels and roots will suffocate. Pour and level without pressing down. Do not water with plain water either, since the grow medium contains no nutrients and the plant receives only what you add, from the very first watering. Finally, rinse thoroughly between crops to flush out the salts left behind by the nutrient solution and restore the grow medium to its original conductivity.

One bag for around fifteen pots

Add a complete fertiliser and something to contain the grow medium, pots or growing baskets. A 50 L bag fills around fifteen 3 L pots. Don't forget a pH test either, since all nutrition is delivered through the irrigation water and its value determines what the plant actually takes up.

🌿 Pot, flood table, seedling

Pot growing is the primary use, with complete nutrition delivered at every watering. On a flood-and-drain table, the natural fibre retains water for several hours, allowing flood cycles to be spaced further apart. For seedlings, its fine texture suits seeds well, provided nutrition is introduced from the first true leaves onwards. The overview of grow media puts coco in context alongside the other options.

♻️ Reusing the fibre

A coir grow medium lasts around three growing cycles, and that reuse needs to be planned for. At the end of a healthy crop, remove the root ball and any large debris, then rinse thoroughly with clean water until the conductivity of the run-off matches that of the incoming water. This rinse flushes out accumulated salts, which are the real limiting factor in reuse, well before the structure of the medium itself. After a root disease outbreak, however, the fibre goes to the compost rather than the next pot: a fibrous grow medium retains spores far more readily than a mineral one. Finally, add a proportion of fresh perlite at each reuse, as the fibre gradually loses some of its volume and porosity with each cycle.

Technical specifications

The essentials

Volume: 50 LOne bag fills around fifteen 3 L pots.
Composition: Coco fibre · 75% coco and 25% perliteTwo versions to choose from: natural fibre or perlite-blended cut fibre.
Application: The bag opens and poursNothing to rinse before planting.
Nutrition: Applied with every wateringWith a formula designed for coco fibre, from the very first watering.
Reuse: Up to 3 cyclesRinse thoroughly between crops to flush out accumulated salts.
Bag weight: 12.5 kg · 10.6 kgNatural fibre then fibre with perlite: at the same volume, the perlite reduces the bag's weight by nearly two kilograms.

To budget for separately

Fertiliser: A formula for cocoIt is dosed for the way this grow medium exchanges with the nutrient solution.
Containers: Pots or mesh basketsCalculate the volume before ordering: 50 L fills around fifteen 3 L pots.

In the box

1 bag of coco coir, 50 L, in the chosen version, plain or with perlite.

Volume, composition of both versions, number of reuses and bag weights: figures stated by the supplier, recorded on 10/09/2026. The approximate fifteen 3 L pots is a guide figure calculated on the volume of the bag.

Pure or with perlite?

Same fibre, same volume, same preparation. Only the water and air circulation changes.

Both bags hold 50 litres: what differs is the speed at which water moves through them. Perlite opens up the grow medium and lets water drain freely. Without it, the fibre retains moisture longer and forgives a missed watering.

	Retains water for a long time	Drains quickly after watering	Suitable for frequent drip irrigation	Forgives a missed watering	Volume (L)	Weight (kg)	Pre-fertilised	Rinsing required before use
Recommended Pure cocoYour choice	Yes	No	No	Yes	50 L	12.5 kg	No	No
Coco and perliteYour choice	No	Yes	Yes	No	50 L	10.6 kg	No	No

Pure cocoRecommended

Water behaviour

Retains water for a long timeYes

Drains quickly after wateringNo

Suitable for frequent drip irrigationNo

Forgives a missed wateringYes

The bag

Volume (L)50 L

Weight (kg)12.5 kg

Pre-fertilisedNo

Rinsing required before useNo

Coco and perlite

Water behaviour

Retains water for a long timeNo

Drains quickly after wateringYes

Suitable for frequent drip irrigationYes

Forgives a missed wateringNo

The bag

Volume (L)50 L

Weight (kg)10.6 kg

Pre-fertilisedNo

Rinsing required before useNo

Both are handled in exactly the same way: the same fertiliser, the same target pH, the same number of reuses.

Documents & manuals

Manufacturer's page, coco fibre

Presentation of the manufacturer's two coco fibres, pure and with perlite, in English.

LIEN

Download

Estimate your
delivery time

50 L bag. Volume counts for more than weight when calculating shipping: a bag of grow medium takes up the space of several standard parcels. Exact shipping costs and final delivery times are shown at checkout once your address has been entered. Outside the European Union, import duties and taxes remain the responsibility of the recipient. Delivery times run from dispatch, excluding public holidays.

Frequently asked questions

8 questions

6 key questions, 8 in the detailed view

Pure coco or coco with perlite: which should you choose?

Both bags contain the same coco fibre. Perlite replaces a quarter of the volume, and that changes just one thing: how quickly water drains through.

Your situation	Pure coco	Coco and perlite
Hand watering, once or twice a day	yes	drains back quickly
Frequent drip irrigation, flood-and-drain	risk of waterlogging	yes
Deep pots, over 15 L	stays wet at the bottom	yes
You are away frequently	yes	dries out faster
Plants sensitive to root suffocation	no	yes

In short, pure coco forgives a missed watering; coco with perlite forgives overwatering. The bag with perlite is also around two kilos lighter to carry, for the same volume.

Should the fibre be rinsed before use?

Does this grow medium feed the plant?

Which fertiliser should you use with coco fibre?

Choose a fertiliser formulated for coco. This grow medium exchanges elements with the nutrient solution: it retains some and releases others. A formula designed for coco fibre is dosed accordingly, whereas a fertiliser intended for soil becomes unbalanced within a few waterings.

The sign of a poor choice is a deficiency in young leaves even though your solution contains what they need.

What is the pH of this grow medium?

What exactly does perlite change?

Perlite is an expanded volcanic rock, inert and full of air pockets. It contributes neither nutrients nor water retention: it takes up volume and keeps air within it.

In practice, a quarter perlite mix allows water to drain faster and air to return sooner after each watering. This is a clear advantage in a deep pot, where pure coco can compact and retain a saturated zone at the bottom, and in any system where water returns frequently. It is a drawback if you water by hand once a day in the height of summer: the grow medium will be dry before you get back.

How many times can it be reused?

Is coco fibre a good alternative to peat?

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50 L coco fibre, natural or with perlite

The summary