Container of TriPart Bloom by Terra Aquatica, flowering fertiliser, on a white background

The complete TriPart range: Grow, Bloom, Micro soft water and Micro hard water

TriPart application chart for hydroponics and coco fibre

TriPart application chart for soil growing

TriPart Bloom flowering fertiliser

1,200.00 RSD

Capacity	Price	Price per L	vs 500 ml
500 ml	1,200.00 RSD	2,400.00 RSD	—
1 L	1,800.00 RSD	1,800.00 RSD	−25 %
5 L	5,800.00 RSD	1,160.00 RSD	−52 %
10 L	9,600.00 RSD	960.00 RSD	−60 %
60 L	45,500.00 RSD	758.33 RSD	−68 %

400.00 RSD × 3 with no fees Klarna.

This liquid mineral flowering fertiliser, with a NPK 0-5-4 formula and no nitrogen, delivers the phosphorus needed for flower initiation and the potassium for fruit fill, along with 3% magnesium and 5% sulphur. It forms the third part of the TriPart system, for use in hydroponics, coco fibre and soil.

Ref. TA-TPB-500·Hydroponic fertiliser

Capacity : 500 ml

500 ml

Customer support 7 days a week by email

Delivery within 2 to 15 business days

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The summary

What it is: a liquid mineral fertiliser NPK 0-5-4, rich in magnesium and sulphur, and the third part of the TriPart system.
When it comes into play: present from the first roots at a low dose, it becomes dominant at flowering, where it reaches 2.4 ml per litre.
How much to use: 2.4 ml per litre in hydroponic flowering, 2.1 ml per litre in soil. The calculator converts for your reservoir.
Zero nitrogen — why: nitrogen stimulates leaf growth at the expense of flowers. That role belongs to the Grow, which is reduced at this stage.
Suitable crops: tomato, strawberry, pepper, aubergine, cucumber — anything harvested as fruit.
Sizes and dispatch: 500 ml, 1 L, 5 L, 10 L, or 60 L, dispatched from France.

Phosphorus, potassium, magnesium and sulphur, nitrogen-free, for flowering

TriPart Bloom, from the TriPart range, is a liquid mineral flowering fertiliser, NPK 0-5-4, nitrogen-free, enriched with magnesium (3% MgO) and sulphur (5% SO3). It supplies the phosphorus for buds and the potassium for fruit filling. Its dose rises from 0.6 ml per litre in growth to 2.4 ml per litre in hydroponic flowering.

TriPart Bloom is the flowering fertiliser in the TriPart system, a liquid mineral fertiliser with an NPK formula of 0-5-4, enriched with magnesium and sulphur. It is the former FloraBloom, with only the label changed. During flowering, the plant requires phosphorus to form its buds and potassium to fill its fruits, and no longer needs nitrogen in significant quantities.

🌸 The moment of the first Bloom

A plant does not switch from growth to flowering overnight; it gradually builds up the reserves that will carry its flowers, and phosphorus comes into play from the rooting stage. The Bloom therefore supports the whole cycle, at a dose that varies considerably, rather than being added from a set date. It is the ratio between the three parts that changes, never the presence of any one of them.

🍅 Switching between Grow and Bloom

In growth

Grow leads at 1.8 ml per litre, Bloom stays back at 0.6. The plant is producing leaves and stems.

In pre-flowering

All three are close, around 1.5 to 2 ml per litre. The target pH moves to 6.4–6.8.

In flowering

Bloom moves to the front at 2.4 ml per litre, Grow drops back to 0.8. In soil, allow 2.1 ml per litre.

Before concluding there is a deficiency and increasing the dose, check the pH of your reservoir. From pre-flowering onwards, the target pH rises to 6.4 to 6.8, and outside its range phosphorus binds with the calcium or iron in the solution, making it unusable even though it is there. This mistake leads you to overdose an element that is in fact already present in the solution. The article on pH regulation explains how to keep it in check.

Bloom is added from the first week

Waiting for the first flowers to appear before starting Bloom means stepping in too late, because the plant builds its roots and its phosphorus reserves well before then. From the first roots, the dose you apply is 0.5 ml per litre, and it never drops to zero. What changes over the course of the cycle is only the ratio to Grow, and a late catch-up never replaces a regular supply from the start.

The trio that Bloom completes

Bloom does not make up a solution on its own. Choose TriPart Micro at the same time, in the version that matches your water, along with TriPart Grow, which stays in use until harvest. Grow supplies the nitrogen that Bloom does not contain, and Micro supplies the iron, calcium and trace elements.

🧪 Magnesium and sulphur

Beyond phosphorus and potassium, the formula contains two less talked-about elements, which nonetheless matter a great deal here. Magnesium, at 3%, is the atom at the heart of chlorophyll, and your plants in full fruiting run short of it quickly, which shows on the lower leaves, where the blade yellows between veins that stay green. Sulphur, at 5%, is involved in making amino acids and aromatic compounds, and its role shows less in vigour than in the flavour of what you harvest.

📦 Sizes and storage

On a fruiting crop, where flowering lasts several months, Bloom is used up faster than Grow, since its dose is multiplied by four between growth and flowering while the dose of Grow falls by more than half. A set of three bottles of the same size will therefore become unbalanced with use, and it is often wise to take the Bloom in a size up from the other two. Keep the bottles closed, away from light and frost: the concentrate keeps for 5 years after opening. Any sediment that appears after cold storage will go back into solution with a simple shake, and the product is not affected.

Technical specifications

The essentials

Formula: NPK 0-5-4No nitrogen. Phosphorus and potassium are the two drivers of flowering and fruiting.
Role in the system: Flowering partPresent at every stage, dominant from flowering onwards.
Flowering dose: 2.4 ml per litreHydroponics and coco coir. In soil, 2.1 ml per litre.
Growth dose: 0.6 ml per litreIts dose never drops to zero, even when Grow is dominant.

Magnesium and sulphur

Magnesium: 3% MgOThe central atom of chlorophyll. A deficiency shows on the lower leaves, which turn yellow between the veins.
Sulphur: 5% SO3Involved in amino acids and aromatic compounds. This is the part of the formula that influences flavour.

Parameters and safety

Target pH during flowering: 6.4 to 6.8Higher than in growth, where the target is 5.5 to 6.5.
Appearance: Pink liquid, odourlessThe colour prevents mixing up the containers when measuring out doses.
Regulatory classification: Not classified as hazardousNo hazard pictograms, no warning statements. Safety advice P101 and P102.
Storage: Upright, sealed, in a cool placeStore in a cool, dry, well-ventilated place away from foodstuffs. A crystalline deposit indicates storage at too low a temperature.

To budget for separately

TriPart Micro: Soft water or hard waterIt carries iron and calcium, which are absent from the other two parts.
TriPart Grow: 1 growth bottleIt stays at 0.8 ml per litre throughout flowering.

4 further specifications are available in the detailed view.

In the box

1 bottle of TriPart Bloom in your chosen size: 500 ml, 1 L, 5 L, 10 L or 60 L.

Formula 0-5-4, 5% P2O5, 4% K2O, 3% MgO and 5% SO3: label and official Terra Aquatica website. pH of the concentrate, density, appearance and classification: French safety data sheet, version 7 dated 26 December 2023. Dosages and pH ranges: application table, consulted on 10 September 2026.

Manufacturer and product safety

Manufacturer: TERRA AQUATICA (SAS, SIREN 840329619), ex General Hydroponics Europe
Postal address: 4 boulevard du Biopole, ZI du Biopole, 32500 Fleurance, France
Contact: info@terraaquatica.com ; +33 5 62 06 08 30
Website: www.terraaquatica.com

Information provided under Regulation (EU) 2023/988 on general product safety.

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. Bloom takes precedence during flowering and fruiting, while the Grow dose is reduced.

A flowering fertiliser added too early shows no effect whatsoever As long as the plant is producing leaves, it is a different bottle that takes the lead. The symptom you describe will tell you which one.

	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 hazardous	Safety glasses required when measuring	Liquid colour	Previous name
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
Recommended 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 Grow

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

Hydroponic dosage, 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 hazardousNo

Safety glasses required when measuringNo

Liquid colourGreen

Previous nameFloraGro

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

Hydroponic dosage, 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 hazardousYes

Safety glasses required when measuringYes

Liquid colourDark brown

Previous nameFloraMicro

TriPart BloomRecommended

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

Hydroponic dosage, 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 hazardousNo

Safety glasses required when measuringNo

Liquid colourPink

Previous nameFloraBloom

Formulas recorded from the labels on the containers; classifications from the French safety data sheets. Dosages taken from the 2025 application chart, hydroponics and coco coir column. Values recorded on 10 September 2026.

Documents & manuals

TriPart application chart, hydroponics, coconut fibre and soil, multilingual document

The official table, stage by stage, in millilitres per litre for Grow, Micro and Bloom, with the conductivity and pH ranges. A single file, in several languages including French.

PDF · 4

Download

TriPart Bloom safety data sheet, in French

Version 7 of 26 December 2023. Regulatory classification, physico-chemical properties, storage instructions and first aid measures.

PDF · 4

Download

Safety data sheet TriPart Bloom, in English

The same safety data sheet in English, version 7 of 26 December 2023, for a non-French-speaking contact.

PDF · 4

Download

Estimate your
delivery time

Liquid not classified as dangerous for transport, dispatched by tracked parcel from France. Weight ranges from approximately 600 grams for the 500 ml to approximately 12 kilos for the 10 L: exact shipping costs and 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.

Frequently asked questions

6 questions

6 key questions

How much TriPart Bloom for 10 litres of water, and from which stage?

24 mlsoilless

21 mlin soil

6 mlin growth

The gap between 6 and 24 ml is the whole principle of the system. Bloom is added from the first roots, at 0.5 ml per litre, and not on the day the flowers appear: by then the plant has already built the tissues that carry them. What changes over the course of the cycle is the ratio between the three parts. If used on its own, without Micro, the solution contains no iron, no calcium and no trace elements, and deficiencies appear within a few weeks.

Why does TriPart Bloom contain no nitrogen?

Because nitrogen restarts leaf production. A plant that receives a lot of nitrogen during flowering keeps producing foliage instead of filling out its fruit.

The zero in the formula does not mean the plant no longer needs nitrogen during flowering. It still receives some, through the Grow kept at 0.8 ml per litre and through the Micro. The Bloom simply supplies none, so that the adjustment can be made elsewhere.

Two lesser-discussed elements matter a great deal here: magnesium, 3% MgO, the atom at the centre of the chlorophyll molecule, whose shortage makes the lower leaves yellow between the veins, and sulphur, 5% SO3, which goes into two amino acids and into the aromatic compounds, that is, into flavour and scent.

What dose at each stage, and on which crops does Bloom actually make a real difference?

The values are in millilitres per litre of solution, for the Bloom on its own. The Grow and the Micro are dosed alongside it.

Stage	Soilless	Soil	Target pH
First roots	0.5	0.2	5.5 to 6.5
First true leaves	1	0.6	5.5 to 6.5
Growth	0.6	0.5	5.5 to 6.5
Pre-flowering	1.5	1	6.4 to 6.8
Flowering	2.4	2.1	6.4 to 6.8

Note that the target pH rises from pre-flowering onwards. The Grow, for its part, never stops: it drops back to 0.8 ml per litre and stays in the schedule until harvest.

The Bloom matters most for crops harvested for their fruit.

Crop	Flowering dose	What you observe
Tomato	2.4 ml/L	It fruits for 3 to 4 months in a row, and the demand for potassium does not drop between trusses.
Strawberry	2.4 ml/L	It produces in successive waves and draws on its reserves with each wave.
Pepper	2.4 ml/L	It flowers and sets fruit continuously all summer, with no resting period.
Aubergine	2.4 ml/L	Large fruits that swell quickly once set, with heavy demand concentrated over a few weeks.
Cucumber	2.4 ml/L	Continuous harvest and large volumes of water consumed: keep an eye on the conductivity, which changes quickly.
Lettuce, spinach	0.5 to 0.6 ml/L	Harvested for their leaves, they never reach the flowering that matters here.
Basil, rocket	0.5 to 0.6 ml/L	Here flowering is what you are trying to delay, because it makes the leaves taste harsher.

An extra PK booster only makes sense if your conductivity stays low at the end of the cycle: the target range in flowering is 1.4 to 2.2 mS, and it is this value that tells you whether there is room left, not the look of the flowers. The article on the 15 plants to grow helps you put together a tank where the Bloom really earns its place.

My stems are taking on a purplish tinge — is this a phosphorus deficiency?

Not necessarily. A purplish tinge on the stems may simply be a varietal trait or a reaction to cold nights, unrelated to nutrition.

Phosphorus deficiency: the leaves take on an unusually dark green, then purplish tinges appear on the veins underneath. Flowering is slow and the buds stay small. The symptom starts on the oldest leaves.
Potassium deficiency: the edges of the older leaves turn brown and dry out, leaving the centre of the leaf blade green. The fruits stay small and soft, and ripen unevenly from one side to the other.

In both cases, check the pH before changing the dosage: the guide to plant deficiencies describes the signs of potassium deficiency.

Does Bloom have a place in an aquaponic tank, or in a soil-based vegetable garden?

On a fishless system, or on a decoupled loop where the plants receive their own nutrient solution, yes, just as in conventional hydroponics. On a stocked pond, a separate product is formulated for this purpose, the Aquaponic Mix, designed to complete the mineralisation of fish waste without unbalancing the water: this is the one you need as soon as fish share the circuit.

In soil, yes as well, using the dedicated column of the application chart, from 0.2 ml per litre at the first roots to 2.1 ml at flowering: the soil itself holds and releases part of the nutrients. On a living, already fertile soil, feeding is mainly worthwhile at full fruiting, when the demand for potassium exceeds what the soil releases. Finish the cycle with clear water, which the chart calls flushing.

Which Bloom size should you choose?

Size	What it covers, at the flowering dose
500 ml	About 210 L of solution.
1 L	About 415 L. The size for a home setup.
5 L	About 2,080 L.
10 L	About 4,165 L.
60 L	About 25,000 L, for a commercial operation.

These volumes are calculated at 2.4 ml per litre. Over a full cycle, in which Bloom spends most of the time between 0.5 and 1.5 ml, a container lasts much longer than this table suggests.

It is the most harmless of the three bottles in the system: its safety data sheet does not classify it as hazardous, with no pictogram or warning statement, whereas Micro requires safety glasses. It is still a concentrated fertiliser, to be kept out of the reach of children and away from food. A crystalline deposit at the bottom comes from storage that is too cold: bring the bottle back to room temperature and shake until it has disappeared completely, otherwise every millilitre drawn off is weaker than intended.

How much TriPart Bloom for your reservoir

Enter the water volume of your reservoir. The calculation applies the flowering dose for hydroponics and coco coir, 2.4 ml per litre.

Reservoir water volume

5 L1000 L

0ml

of TriPart Bloom, the flowering nutrient for hydroponics and coco fibre

Same stage, but in soil

0 ml

This dose applies to the flowering stage. During growth, the Bloom drops to 0.6 ml per litre, and at first root development to 0.5. It is always used alongside the Grow and Micro, never on its own. During flowering, the target conductivity is 1.4 to 2.2 mS and pH 6.4 to 6.8.

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TriPart Bloom flowering fertiliser

The summary