Fertiliser kit for coco fibre, from growth to harvest
Regular price
$25.05
Regular price
$33.98
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$25.05
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$8.35 × 3 with no fees
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A hydroponics growing programme on coco fibre is built around a growth fertiliser NPK 4-0-5 and a bloom fertiliser NPK 1-6-4. The 500 ml kit adds a nitrogen-free end-of-bloom fertiliser and a 25 g sachet of powdered pH-, while the 1 L and 5 L sets bring together both coco fertilisers for large reservoirs.
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The summary
- What you receive: coco growth fertiliser, coco bloom fertiliser, and coco late-bloom fertiliser in 500 ml with 25 g of powdered pH- in the kit, or the two coco fertilisers in 1 L or 5 L in the bundles.
- The programme: both coco fertilisers together throughout the full cycle, then the nitrogen-free fertiliser for the final 12 to 13 days.
- What it covers: approximately 200 litres of growth solution with the kit, 400 litres with the 1 L bundle, and 2,000 litres with the 5 L bundle.
- Safety: the pH- and the growth fertiliser should be handled with gloves and eye protection.
Growth and flowering fertiliser for coco fibre, in a 500 ml kit or in larger quantities
This kit contains the complete programme for growing in coco coir, from first root to harvest. It brings together the coco growth fertiliser NPK 4-0-5, the coco bloom fertiliser NPK 1-6-4, and the nitrogen-free late-bloom fertiliser NPK 0-6-5, each in a 500 ml bottle, along with a 25 g sachet of powdered pH-. In a single box you therefore have the three fertilisers used in succession throughout the growing cycle, plus the corrector to adjust your solution. It is aimed at growers who are new to coco coir cultivation, or who want to trial this programme before committing to larger formats.
Coco fibre locks up some of the calcium in the solution, which is why a standard hydroponic fertiliser used with it often causes deficiencies in young leaves. Both fertilisers in this programme compensate for this effect: the grow bottle contains 5% calcium and the bloom bottle contains 3% magnesium and 5% sulphur. They are always added together, separately into the water, and only their ratio changes from one stage to the next. You therefore need no additional calcium and magnesium supplements.
🥥 The programme stage by stage
At the first roots, use 0.5 ml per litre of each fertiliser, then 1 ml per litre at the first true leaves. During growth, the grow bottle increases to 2.5 ml per litre with 1 ml of bloom, then to 3 ml with 2 ml at pre-flowering. In flower, the ratio reverses, with 1.5 ml of grow to 3 ml of bloom. Conductivity moves from 0.3 to 0.6 mS at the start up to 1.4 to 2.2 mS in flower, and it should be measured once the pH has been corrected.
Taking over from the powdered pH- sachet
The 25 g sachet covers the initial preparations of the cycle. Going forward, the liquid pH adjuster is dosed drop by drop, with no prior dissolving, which makes small corrections to a reservoir of a few tens of litres simpler than with the powder. Add it after the two coco fertilisers, as these themselves alter the pH, and measure after each addition, aiming for 5.5 to 6.5 during growth and 6.4 to 6.8 during flowering.
During the final 12 to 13 days, the two coco fertilisers give way to the end-of-flowering bottle, which is used alone at 5 ml per litre. Deprived of nitrogen, the plant draws on the reserves in its older leaves, which gradually yellow as the flowers and fruits complete their ripening. A 48-hour flush before and after this phase clears accumulated salts from the grow medium, and the flushing solution makes this process more effective. Harvest takes place 2 days after the final feed.
Handle pH- powder with gloves and eye protection
The pH- powder is urea phosphate, which forms a highly acidic solution when dissolved and can cause severe skin burns and eye damage. Wear gloves and eye protection, always dissolve the powder in a large volume of water, and rinse thoroughly in the event of contact. The growth bottle is also classified as hazardous to eyes. Keep the kit out of reach of children, in a dry location and away from flammable materials.
Growth, 500 ml
NPK 4-0-5 with 5% calcium, from 0.5 to 3 ml per litre depending on the growth stage.
Floraison, 500 ml
NPK 1-6-4 with magnesium and sulphur, 0.5 to 3 ml per litre depending on the growth stage.
Late bloom, 500 ml
NPK 0-6-5 with no nitrogen, at 5 ml per litre during the last 12 to 13 days.
pH- powder, 25 g
1 g dissolved in 5 to 6 litres, added in small amounts until the target pH is reached.
📊 What the kit covers
At the growth dose of 2.5 ml per litre, the growth bottle prepares 200 litres of solution, and the bloom bottle approximately 165 litres at 3 ml per litre. The end-of-bloom bottle covers 100 litres at 5 ml per litre, and the pH- sachet prepares 125 to 150 litres of acidic solution at 1 g per 5 to 6 litres, of which each correction uses only a portion. This is the quantity needed for one cycle over a few coco fibre pots or a small flood-and-drain table. For a larger growing area, the 1 L and 5 L sizes take over.
🧴 Large-format bundles
The 2 x 1 L and 2 x 5 L packs bring together the coco grow fertiliser and the coco bloom fertiliser in the same format, for a setup that goes beyond a few pots. At 2.5 ml per litre, a 1 L grow bottle makes up 400 litres of solution, and a 5 L bottle around 2,000 litres, enough to run a flood-and-drain table or several coco fibre tanks throughout an entire season. The late-bloom fertiliser and the liquid pH adjuster can then be chosen to match your reservoir size, and each pack costs less than buying the two bottles separately.
🍅 Suitable crops
The programme is suitable for all crops grown in coco coir, pure or mixed with perlite, whether in pots or a flood-and-drain table, with tap water or reverse-osmosis water. Tomatoes, peppers, strawberry plants and flowering plants benefit the most, as the programme supports them from flowering through to ripening. It is not, however, suitable for organic growing, nor for the water of a system containing fish. If you grow organically, the organic fertiliser kit meets that need.
📦 The kit and how to store it
The box measures 23 x 16.9 x 7.7 cm and weighs 2.1 kg. The liquid fertilisers keep for 5 years after opening, stored upright and tightly sealed, and the pH- sachet also keeps for 5 years after opening, properly resealed, in a dry place and out of reach. The box works out cheaper than buying the three fertilisers separately, and lets you test the programme before investing in the larger formats.
Technical specifications
The contents
- Coco grow fertiliser
- 500 ml, 1 L or 5 L, NPK 4-0-5
- Coco flowering fertiliser
- 500 ml, 1 L or 5 L, NPK 1-6-4
- Late-flowering fertiliser
- 500 ml, NPK 0-6-5Nitrogen-free, in the 500 ml kit
- pH- powder
- 25 gUrea phosphate, in the 500 ml kit
Use
- Total of the two coco fertilisers
- 5 ml per litre at most, during pre-flowering
- Late flowering
- 5 ml per litreLast 12 to 13 days on coco fibre
- Solution pH
- 5.5 to 6.5, then 6.4 to 6.8 during flowering
- Conductivity
- 0.3 to 2.2 mSFrom the first roots to flowering
The parcel
- Dimensions
- 23 x 16.9 x 7.7 cm500 ml kit box
- Weight
- 2,1, 2,5 or 12,5 kgKit, 1 L pack, 5 L pack
- Hazard classification
- DangerpH- : H314 ; growth fertiliser : H318
- Organic farming
- Not suitable
To budget for separately
- pH measurement
- A pH test kit in drops
- Rinsing the grow medium
- A flushing solution
6 further specifications are available in the detailed view.
In the box
- 1 coco growth fertiliser
- 1 coco bloom fertiliser
- Bottles of 500 ml, containers of 1 L or 5 L, depending on the format chosen
- In the 500 ml kit: 1 late-bloom fertiliser, 1 sachet of pH- of 25 g and 1 dosing chart
Contents, dimensions, weight and storage details taken on 02/10/2026 from the manufacturer's product sheet; doses taken from the 2025 application table; hazard classifications taken from the safety data sheets for each product. Batch contents recorded on 07/10/2026.
The five starter kits side by side
The five Starter Kit boxes in the shop, only one of which is formulated for coco fibre.
Coco fibre or another grow medium?
Coco fibre fixes calcium and requires a dedicated formula; other grow media leave the choice down to your water.
| Three-part hydroponics fertiliser kit, for soft or hard waterYour choice | Two-part hydroponic fertiliser kit, soft or hard waterYour choice | Hydroponics starter fertiliser kit, 3 x 500 mlYour choice | Recommended Fertiliser kit for coco fibre, from growth to harvestYour choice | Organic fertiliser kit for getting started, growth and floweringYour choice | |
|---|---|---|---|---|---|
| Bottles poured together during full growth | 3 | 2 | 1 | 2 | 1 |
| Solution prepared by the growth bottle (L) | 278 L | 167 L | 333 L | 200 L | 250 L |
| Hard water version | Yes | Yes | No | No | No |
| Calcium-enriched for coco fibre | No | No | No | Yes | No |
| End-of-cycle fertiliser with no nitrogen included | No | Yes | Yes | Yes | No |
| Suitable for organic farming | No | No | No | No | Yes |
| At least one bottle classified as hazardous | Yes | Yes | Yes | Yes | No |
| Price | $22.77 | $25.05 | $30.78 | $25.05 | $29.63 |
Three-part hydroponics fertiliser kit, for soft or hard water
Bottles poured together during full growth3
Solution prepared by the growth bottle (L)278 L
Hard water versionYes
Calcium-enriched for coco fibreNo
End-of-cycle fertiliser with no nitrogen includedNo
Suitable for organic farmingNo
At least one bottle classified as hazardousYes
Two-part hydroponic fertiliser kit, soft or hard water
Bottles poured together during full growth2
Solution prepared by the growth bottle (L)167 L
Hard water versionYes
Calcium-enriched for coco fibreNo
End-of-cycle fertiliser with no nitrogen includedYes
Suitable for organic farmingNo
At least one bottle classified as hazardousYes
Hydroponics starter fertiliser kit, 3 x 500 ml
Bottles poured together during full growth1
Solution prepared by the growth bottle (L)333 L
Hard water versionNo
Calcium-enriched for coco fibreNo
End-of-cycle fertiliser with no nitrogen includedYes
Suitable for organic farmingNo
At least one bottle classified as hazardousYes
Fertiliser kit for coco fibre, from growth to harvestRecommended
Bottles poured together during full growth2
Solution prepared by the growth bottle (L)200 L
Hard water versionNo
Calcium-enriched for coco fibreYes
End-of-cycle fertiliser with no nitrogen includedYes
Suitable for organic farmingNo
At least one bottle classified as hazardousYes
Organic fertiliser kit for getting started, growth and flowering
Bottles poured together during full growth1
Solution prepared by the growth bottle (L)250 L
Hard water versionNo
Calcium-enriched for coco fibreNo
End-of-cycle fertiliser with no nitrogen includedNo
Suitable for organic farmingYes
At least one bottle classified as hazardousNo
Application rates from the 2025 dosage chart, contents from the official product kit pages and safety data sheet classifications, recorded on 07/10/2026.
Help choosing
The right tray for your grow medium
Documents & manuals
Safety data sheet for coco fertilisers
The document brings together the safety data sheets for the coco growth and flowering fertilisers, including their hazard statements.
Safety data sheet for the late-bloom fertiliser
The data sheet details the composition and storage of the nitrogen-free fertiliser included in the kit.
Safety data sheet for pH- powder
The data sheet specifies the corrosive classification of powdered pH-, the required protective measures and first-aid procedures.
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Frequently asked questions
8 questions
6 key questions, 8 in the detailed view
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