TriPart Grow growth fertiliser
Regular price
$17.00
Regular price
Sale price
$17.00
Unit price
/
per
| Contenance | Prix | Prix au L | vs 500 ml |
|---|---|---|---|
| 500 ml | $17.00 | $34.00 | — |
| 1 L | $23.00 | $23.00 | −32 % |
| 5 L | $71.00 | $14.20 | −58 % |
| 10 L | $121.00 | $12.10 | −64 % |
Liquid mineral growth fertiliser with an NPK formula of 3-1-6, dosed in nitrogen, potassium and magnesium for the vegetative stage: formation of stems, foliage and root system. The first part of the TriPart system, to be used alongside Micro and Bloom, in hydroponics, coco fibre and soil. From 500 ml to 10 L.
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The summary
- What it is: the Grow component of the TriPart system, formerly FloraGro — a liquid mineral NPK 3-1-6 fertiliser designed to support the growth phase.
- How it's used: never on its own. It is dosed alongside TriPart Micro and TriPart Bloom, with the ratios adjusted according to the plant's growth stage.
- How much to use: 1.8 ml per litre for full hydroponic growth, 1.5 ml per litre in soil. The calculator converts the amounts for your reservoir.
- Where it works: hydroponics, coco coir, soil, and decoupled or fish-free aquaponics. For a stocked pond, the Aquaponic Mix is better suited.
- Documents: application chart and safety data sheet in French, downloadable from this page.
- Sizes and shipping: 500 ml, 1 L, 5 L, or 10 L, dispatched from France. Lead times and costs are shown in the estimator on this page.
The nitrogen element of the TriPart trio, the one that drives the growth phase
TriPart Grow is the growth fertiliser in Terra Aquatica's TriPart system, a liquid mineral fertiliser with an NPK formula of 3-1-6, designed for the vegetative stage in hydroponics, coco fibre, and soil. It supplies nitrogen, which is present in every protein the plant produces, potassium, which regulates cell pressure and the movement of sugars, and magnesium. It was formerly known as FloraGro, created in California and now manufactured in Fleurance, in the Gers.
The imbalance in the formula is intentional. Phosphorus is almost absent because it comes from the Bloom; iron and calcium are absent entirely because they come from the Micro. Used alone in a reservoir, Grow produces an incomplete solution on which a plant will deteriorate within around a fortnight. This is the very principle of a three-part system: each bottle does one thing, and it is the ratio between them that supports the plant throughout its growth cycle. If you are new to growing without soil, our guide on indoor hydroponics covers the basics.
Three-part or an all-in-one fertiliser
An all-in-one fertiliser fits in a single bottle and applies the same compromise from seedling to harvest. It is formulated to never be entirely wrong, which means it is rarely quite right: too much nitrogen when the plant is filling its fruit, not enough when it is building its leaves. The three-part system does the opposite. During full vegetative growth, the ratio is 1.8 ml of Grow to 1.2 ml of Micro and 0.6 ml of Bloom per litre; at flowering, it shifts to 0.8, 1.6, and 2.4. The same plant receives two very different solutions without you changing product.
The drawback is real and worth knowing before you buy: three measurements instead of one, three rinses of the dosing equipment, and three bottles that do not empty at the same rate. If you mix a reservoir once a week and grow almost always the same crop, an all-in-one remains a perfectly reasonable choice. The three-part system comes into its own when you are running several crops in parallel, when you want to rein in a plant that is bolting into leaf, or when you buy in 5 L and the price per litre starts to matter. The Starter Kit TriPart lets you try the system in 500 ml before committing.
How the ratio changes
Growing
Grow leads at 1.8 ml per litre, accompanied by 1.2 ml of Micro and 0.6 ml of Bloom. Target conductivity of 1.3 to 1.8 mS.
In pre-flowering
All three converge around 1.5 to 2 ml per litre. The target pH rises from 5.5–6.5 to 6.4–6.8.
In bloom
Grow drops back to 0.8 ml per litre while Bloom rises to 2.4. Too much nitrogen at this stage pushes leaf growth at the expense of fruit.
In soil, the same stages are dosed around 15 per cent lower, because the soil itself retains and releases part of the nutrients: 1.5 ml per litre during full growth instead of 1.8. The calculator on this page converts the figures for your reservoir volume, and the full stage-by-stage table is available to download at the bottom of the page.
Never mix two concentrates together
Each part is added separately to the water, stirring between each one, and rinsing the measure before moving on to the next. Pouring Grow directly into Bloom, or reusing an unrinsed measure, causes salts to precipitate out and become unavailable to plants. The solution will look perfectly normal, and part of what you paid for will remain sitting at the bottom of the container.
pH decides before dosage
This is the number 1 cause of a crop that stagnates despite correct dosing. Between 5.5 and 6.5, the plant can access all elements; above 6.8, iron and manganese gradually become unavailable, and young leaves turn pale even though everything needed is present in the water. Adjust the pH last, after adding all three parts, using a pH- corrector. Our article on pH regulation explains the method in detail.
Recognising a nitrogen or potassium deficiency
Nitrogen deficiency
The lower leaves yellow uniformly, veins included, while the top of the plant stays green. Growth slows, stems become thinner and internodes lengthen. The yellowing moves upwards from the base, because the plant redirects its nitrogen towards new growth.
Potassium deficiency
The edges and tips of older leaves brown, dry out and curl downwards, leaving the centre of the blade green. Fruits develop poorly and ripen unevenly. Here too, the symptom starts on the oldest leaves.
This is the key point that's rarely mentioned: with a complete, correctly dosed solution, both symptoms almost always come from a pH outside its target range, not from a genuine deficiency. Nitrogen and potassium are plentiful in a TriPart reservoir; what makes them unavailable is water that's too alkaline or too acidic. Check the pH and conductivity before increasing the dose, otherwise you're loading the solution with salts without fixing anything. Our guides on plant deficiencies and micro-deficiencies show symptoms with images.
Where this product belongs, and where it is less suited
In hydroponics, coco fibre, and soil, TriPart Grow is right in its element. In aquaponics without fish, or on a decoupled loop where the plants receive their own nutrient solution, it works in exactly the same way. In a stocked pond, however, nutrition is approached differently: fish waste already supplies the nitrogen, and it is iron, potassium, and calcium that tend to be lacking. Aquaponic Mix is formulated for that situation, and DTPA chelated iron for correcting iron deficiency on its own.
Two things to know before you buy
This is not an organic farming input: TriPart belongs to the mineral range; the brand's organic range is Pro Organic. An old reference to a European regulation still appears in the application tables, but it refers to a repealed piece of legislation: we make no claims in that regard.
This is not a classified hazardous product: the current safety data sheet carries no hazard pictogram or warning statement. It does however contain ammonium nitrate, which means it must be kept away from combustible materials and out of reach of children.
What a 100-litre tank costs, in euros
This calculation is rarely published anywhere, yet it's straightforward and often determines which size you buy. Prices as of 25 August 2026. Method: price of the bottle divided by its volume in millilitres, multiplied by the stage dose.
Full growth, at 1.8 / 1.2 / 0.6 ml per litre
| Part | Dose per 100 L | Cost at 1 L size | Cost at 5 L size |
|---|---|---|---|
| TriPart Grow | 180 ml | 2.50 euros | 1.54 euros |
| TriPart Micro | 120 ml | 1.79 euros | 1.20 euros |
| TriPart Bloom | 60 ml | 0.83 euros | 0.51 euros |
| Total | 360 ml | 5.12 euros | 3.26 euros |
Full bloom, at 0.8 / 1.6 / 2.4 ml per litre
| Part | Dose per 100 L | Cost at 1 L size | Cost at 5 L size |
|---|---|---|---|
| TriPart Grow | 80 ml | 1.11 euros | 0.69 euros |
| TriPart Micro | 160 ml | 2.38 euros | 1.60 euros |
| TriPart Bloom | 240 ml | 3.34 euros | 2.06 euros |
| Total | 480 ml | 6.83 euros | 4.34 euros |
Amounts rounded to the nearest penny, with totals calculated before rounding. A 100-litre reservoir therefore costs just over five euros during growth and just under seven euros during bloom, at the 1 L size. Moving up to the 5 L container brings the bill down by around 36 per cent at the same dose, and the gap widens further compared with the 500 ml bottle, which works out at 19.80 euros per litre versus 8.58 euros per litre for the 5 L, a ratio of more than two to one. During growth, it is this container that carries the most weight in the total; during bloom, it is the Bloom, while the Micro increases steadily from one stage to the next. In soil, subtract roughly 15 per cent from each line.
To get started without buying four separate products, the Starter Kit TriPart brings together all three parts in 500 ml along with a pH correction sachet. Each bottle can then be repurchased individually in whichever size suits you, and the price per litre drops significantly from 5 L upwards. Depending on what you are growing, the three bottles will not empty at the same rate: with leafy crops, this is the one that runs out first.
Technical specifications
The essentials
- Declared formula
- NPK 3-1-6Value printed on the label of the container and confirmed by two resellers. A third displays 3-2-6: see the note below the table.
- Role in the system
- Growth stageSupplies nitrogen, potassium and magnesium. Phosphorus comes from Bloom, trace elements from Micro.
- Appearance
- Green liquid, odourlessFrench safety data sheet, version 8 dated 25 July 2024.
- Concentrate pH
- 4,2That of the product in its container, not to be confused with the target pH in the reservoir.
- Relative density
- 1,15Useful for converting volume to mass. French safety data sheet, version 8.
- Dose at full growth stage
- 1.8 ml per litreHydroponics and coco. In soil, 1.5 ml per litre. Official application table from the manufacturer.
- Target pH in the reservoir
- 5.5 to 6.5Up to pre-flowering. After that, 6.4 to 6.8 according to the same chart.
- Target conductivity
- 1.3 to 1.8 mSIn full hydroponic growth. In soil, 1.1 to 1.6 mS.
Safety, storage and identification
- Regulatory classification
- Not classified as hazardousFrench safety data sheet version 8 dated 25 July 2024, section 2.1. No pictogram, no hazard statement.
- Safety advice
- P101 et P102Keep the container to hand in the event of a medical consultation, and keep out of reach of children.
- Substance to declare
- Ammonium nitrateBetween 4 and 10 per cent, CAS number 6484-52-2. This is what dictates the clearance distance from combustible materials.
- Storage
- Upright, sealed, in a cool placeStore in the original packaging, in a dry, well-ventilated place, away from food and combustible materials.
- Shipping
- Not regulatedThis product is not classified as dangerous for transport purposes, as stated in section 14 of the safety data sheet.
- Manufacture
- Fleurance, FranceTerra Aquatica SAS, 4 boulevard du Biopole, 32500 Fleurance. Formerly General Hydroponics Europe.
- Former name
- FloraGroThe product was called FloraGro under the General Hydroponics Europe brand before the name change.
- Available formats
- 500 ml to 10 LFour sizes available. The price per litre decreases as the size increases.
8 further specifications are available in the detailed view.
In the box
- 1 bottle of TriPart Grow in the chosen size: 500 ml, 1 L, 5 L, or 10 L.
- No dispenser, syringe, or pipette is included: have a graduated measuring jug accurate to the millilitre to hand.
- TriPart Micro and TriPart Bloom are not included: they are sold separately and are essential for making up a complete solution.
- No pH or conductivity tester is included: see the water testing collection.
- No paper instructions are included: the official application chart can be downloaded from the documents section of this page.
The NPK formula 3-1-6 is the one printed on the bottle label, visible on the manufacturer's official product image, and reproduced identically by two independent retailers. A third retailer shows 3-2-6 with 1.5 per cent P2O5: we use the label value and note the discrepancy. The pH, density, classification and ammonium nitrate content are taken from the manufacturer's French safety data sheet, version 8 dated 25 July 2024. The dosages and pH and conductivity ranges come from the official application chart. The breakdown of trace elements is not published by Terra Aquatica, who classifies it as a trade secret: we therefore do not provide it.
Grow, Micro, Bloom: what each one does in the TriPart system
The three bottles are not interchangeable, and none of them is used on its own. This table shows what each one contributes, when it takes the lead, and which one requires care.
| Total nitrogen (%) | Phosphorus, P2O5 (%) | Potassium, K2O (%) | Supplies calcium and iron | Supplies magnesium | Available in soft water and hard water versions | First roots (ml/L) | Full growth (ml/L) | Pre-flowering (ml/L) | Flowering (ml/L) | Present at a high dose at every stage | Classified as hazardous | Goggles required when measuring | Liquid colour | Former name at General Hydroponics | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Recommended TriPart GrowYour choice | 3 % | 1 % | 6 % | no | yes | no | 0,5 ml/L | 1,8 ml/L | 2 ml/L | 0,8 ml/L | no | no | no | Green | FloraGro |
| TriPart MicroYour choice | 5 % | 0 % | 1 % | yes | no | yes | 0,5 ml/L | 1,2 ml/L | 2 ml/L | 1,6 ml/L | yes | yes | yes | Dark brown | FloraMicro |
| TriPart BloomYour choice | 0 % | 5 % | 4 % | no | yes | no | 0,5 ml/L | 0,6 ml/L | 1,5 ml/L | 2,4 ml/L | no | no | no | Pink | FloraBloom |
TriPart GrowRecommended
Formula declared on the label
Total nitrogen (%)3 %
Phosphorus, P2O5 (%)1 %
Potassium, K2O (%)6 %
Supplies calcium and ironno
Supplies magnesiumyes
Available in soft water and hard water versionsno
Dosage in hydroponics, millilitres per litre
First roots (ml/L)0,5 ml/L
Full growth (ml/L)1,8 ml/L
Pre-flowering (ml/L)2 ml/L
Flowering (ml/L)0,8 ml/L
Use and safety
Present at a high dose at every stageno
Classified as hazardousno
Goggles required when measuringno
Liquid colourGreen
Former name at General HydroponicsFloraGro
TriPart Micro
Formula declared on the label
Total nitrogen (%)5 %
Phosphorus, P2O5 (%)0 %
Potassium, K2O (%)1 %
Supplies calcium and ironyes
Supplies magnesiumno
Available in soft water and hard water versionsyes
Dosage in hydroponics, millilitres per litre
First roots (ml/L)0,5 ml/L
Full growth (ml/L)1,2 ml/L
Pre-flowering (ml/L)2 ml/L
Flowering (ml/L)1,6 ml/L
Use and safety
Present at a high dose at every stageyes
Classified as hazardousyes
Goggles required when measuringyes
Liquid colourDark brown
Former name at General HydroponicsFloraMicro
TriPart Bloom
Formula declared on the label
Total nitrogen (%)0 %
Phosphorus, P2O5 (%)5 %
Potassium, K2O (%)4 %
Supplies calcium and ironno
Supplies magnesiumyes
Available in soft water and hard water versionsno
Dosage in hydroponics, millilitres per litre
First roots (ml/L)0,5 ml/L
Full growth (ml/L)0,6 ml/L
Pre-flowering (ml/L)1,5 ml/L
Flowering (ml/L)2,4 ml/L
Use and safety
Present at a high dose at every stageno
Classified as hazardousno
Goggles required when measuringno
Liquid colourPink
Former name at General HydroponicsFloraBloom
The formulas are those printed on the bottle labels. The dosages are taken from the official application chart, hydroponics and coco fibre column; for soil, allow approximately 15 per cent less. The hazard statement for Micro is its H318 classification, serious eye damage, taken from the French safety data sheet version 9 dated 25 July 2024; Grow and Bloom are not classified as hazardous. The magnesium figure for Grow comes from a single source; Bloom contains 3 per cent MgO. Prices do not appear in this table: they are correct elsewhere on the page, in your currency.
Documents & manuals
TriPart application chart, hydroponics, coco and soil, multilingual document
The official chart, stage by stage, in millilitres per litre for Grow, Micro and Bloom. It also gives the conductivity and pH ranges to aim for, and the place of the range's additives. This single file is multilingual and includes French and English among other languages, so it does not exist in two separate versions.
Safety data sheet TriPart Grow, in French
Version 8 dated 25 July 2024, compliant with European regulation 1907/2006. It covers the regulatory classification, declared composition, storage instructions, and first aid measures.
Safety data sheet TriPart Grow, in English
The same safety data sheet in English, version 8 dated 25 July 2024. Useful for passing the document to a non-French-speaking contact, or for checking a chemical name in its original formulation.
Document not showing? Some publishers block display inside a frame, so open it in a tab.
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It covers preparing your order and then the transit time quoted by the carrier, counted in working days.
It is not a guaranteed delivery date: public holidays, peak periods, customs or a carrier delay can extend it. The exact amount, in your currency, is worked out in the cart once your address is entered.
Liquid not classified as dangerous for transport, dispatched by tracked parcel from France. Weight varies considerably between sizes, from approximately 600 grams for the 500 ml to approximately 12 kilos for the 10 L: exact shipping costs and final delivery times are displayed 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 the date of dispatch, excluding public holidays.
Frequently asked questions
14 questions
6 key questions, 14 in the detailed view
No questions in this category.
How much TriPart Grow for your reservoir
Enter the water volume of your reservoir. The calculation applies the full-growth dose for hydroponics and coco, 1.8 ml per litre, as stated in the manufacturer's application table.
L
5 L1000 L
0ml
of TriPart Grow, full-growth dose in hydroponics and coco
Same stage, but in soil
0 ml
This dose corresponds to the full growth stage. At the first roots, the table drops to 0.5 ml per litre, and at flowering Grow falls back to 0.8 ml per litre while Bloom rises. Grow never makes up a solution on its own: the same table prescribes Micro and Bloom at every stage. Always check the resulting conductivity, which also depends on your starting water.
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