Two-part flowering fertiliser, NPK 1-6-4
Regular price
1,200.00 RSD
Regular price
Sale price
1,200.00 RSD
Unit price
/
per
| Format | 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 | 5,500.00 RSD | 1,100.00 RSD | −54 % |
| 10 L | 10,800.00 RSD | 1,080.00 RSD | −55 % |
400.00 RSD × 3 with no fees
Klarna.
This liquid mineral flowering fertiliser, NPK 1-6-4 with magnesium, sulphur, and chelated trace elements, forms the second half of a two-part fertiliser. It supplies all the phosphorus in the programme, and is therefore used alongside its grow-phase counterpart from the first roots onwards.
A single formulation suits both soft and hard water.
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The summary
- What you receive: a 500 ml or 1 L bottle, or a 5 or 10 L container, of liquid fertiliser NPK 1-6-4.
- Its role: it supplies the phosphorus, magnesium and sulphur that the growth part does not contain.
- The dose: from 0.5 ml per litre at first roots to 3 ml per litre at peak flowering.
- Water: a single version, to be used alongside the soft water or hard water growth part.
Bloom part of a two-bottle mineral fertiliser, suitable for all water hardness levels
In a two-part fertiliser, each bottle contains half of the nutrients. This one brings together phosphorus, at 6% P2O5, potassium, magnesium and sulphur, while the growth part NPK 5-0-5 provides the bulk of the nitrogen and the calcium. Both bottles are used together throughout the entire cycle, and it is their ratio that changes: the growth part dominates until pre-flowering, then this one takes over when your plants are forming their flowers and fruit.
🌸 The phosphorus of the whole programme
Because the grow part contains no phosphorus, this bottle is used from the very first root development, where phosphorus supports the formation of the root system. It also supplies 3% magnesium oxide and 5% sulphur trioxide, in sulphate form, compounds that cannot coexist with calcium in a concentrate. Its nitrogen content, at 1.5%, is split between nitric and ammoniacal forms, and its trace elements are chelated with EDTA, with iron chelated with DTPA and EDDHA, keeping it available to your plants up to a high pH.
In hydroponics, the dose of this bottle rises from 0.5 ml per litre at first roots to 1 ml per litre during growth, then to 2.5 ml at pre-flowering and 3 ml at full flowering. At the same time, you reduce the growth part from 3 ml per litre down to 1.5 ml during flowering. The target conductivity sits between 1.8 and 2.0 mS at pre-flowering and between 1.4 and 2.2 mS at flowering. In soil, this bottle stays at 3 ml per litre at full flowering and drops to 2 ml at pre-flowering.
Finishing the cycle with an end-of-bloom fertiliser
During the final 10 to 15 days, both bottles give way to the nitrogen-free late-flowering fertiliser, used on its own at 5 ml per litre in hydroponics and 4 ml per litre in soil. Deprived of nitrogen, the plant remobilises the nitrogen stored in its older leaves, which gradually yellow, a sign that ripening is progressing as it should. The same product can also be used to bring a few lagging plants into line with the rest.
Never mix the two neat concentrates together
Poured together neat, the two bottles form a white precipitate, because the calcium in the growth part reacts with the sulphates and phosphates in this one. Always add each measured dose to the reservoir water separately, stir between additions, and rinse the measure before switching bottles. The concentrate is not classified as hazardous, but keep it out of reach of children.
🍓 A reservoir in full bloom
Take six strawberry plants in a gutter, fed from a 20-litre reservoir. At full flowering, pour in 30 ml of the growth part, mix, then add 60 ml of this bottle, giving a total of 4.5 ml of fertiliser per litre. Next, measure the pH with a drop pH test and bring it to between 6.4 and 6.8, the target range at flowering, then check that the conductivity stays below 2.2 mS. The solution is renewed every week.
🧴 Sizes and usage rate
At 3 ml per litre, the full-bloom dose, the 500 ml bottle makes around 165 litres of solution, the 1 L bottle around 330 litres, the 5 L container over 1,600 litres, and the 10 L container over 3,300 litres. This is the bottle that empties fastest during flowering, whereas the grow part is used up mainly during the vegetative phase. The fertiliser complies with EU Regulation 2019/1009, is manufactured in France, and keeps for 5 years after opening when the cap is screwed on tightly.
Technical specifications
The composition
- NPK
- 1-6-4
- Magnesium
- 3% MgO
- Sulphur
- 5% SO3
- Trace elements
- Cu, Mn, Zn chelated EDTAChelated iron DTPA and EDDHA
Use
- First roots
- 0,5 ml/L
- Full flowering
- 3 ml/LWith 1.5 ml/L of the growth part
- EC during flowering
- 1.4 to 2.2 mS
- Water hardness
- AllSingle version
The bottle
- Formats
- 500 ml, 1 L, 5 L, 10 L
- Standard
- Regulation (EU) 2019/1009PFC 1.C.I.b
- Hazard classification
- Uncategorised
- Organic farming
- Not suitable
To budget for separately
- Growth stage
- The growth fertiliser 5-0-5
- Ripening
- A late-bloom fertiliser
6 further specifications are available in the detailed view.
In the box
- 1 bottle of 500 ml or 1 L, or 1 container of 5 or 10 L, depending on the size chosen
Composition, standard, dosages, conductivities and storage conditions taken on 02/10/2026 from the manufacturer's product sheet, their 2025 application chart and their safety data sheet dated 26/07/2024.
TriPart, DualPart or NovaMax: which system for bloom
The three flowering components from the mineral range. They differ in the number of bottles to measure out, the dose and the concentration rating.
Accurate dosing and proper storage make all the difference
During flowering, TriPart is dosed from three bottles, DualPart from two, and NovaMax from just one. The NovaMax concentrate is an oxidiser: store it well away from anything flammable.
| Bottles to use during growth | Bottles to use at pre-flowering | Bottles to add at flowering | System available in soft water and hard water versions | Dose of the bloom bottle at peak flowering (ml/L) | Total added at full flowering, all bottles combined (ml/L) | Bloom bottle dose during pre-flowering (ml/L) | NPK of the bloom bottle | Phosphorus from the bloom bottle, P2O5 (%) | Classification of the flowering bottle | Oxidising concentrate, statement H272 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TriPart Bloom flowering fertiliserYour choice | 3 | 3 | 3 | Yes | 2,4 ml/L | 4,8 ml/L | 1,5 ml/L | 0-5-4 | 5 % | Uncategorised | No |
| Recommended DualPart BloomYour choice | 2 | 2 | 2 | Yes | 3 ml/L | 4,5 ml/L | 2,5 ml/L | 1-6-4 | 6 % | Uncategorised | No |
| Liquid bloom fertiliser in a single bottle, NPK 4-8-7Your choice | 1 | 2 | 1 | No | 2,5 ml/L | 2,5 ml/L | 1 ml/L | 4-8-7 | 8 % | Danger, H272 and H318 | Yes |
TriPart Bloom flowering fertiliser
Pour-top bottles
Bottles to use during growth3
Bottles to use at pre-flowering3
Bottles to add at flowering3
System available in soft water and hard water versionsYes
Doses in hydroponics
Dose of the bloom bottle at peak flowering (ml/L)2,4 ml/L
Total added at full flowering, all bottles combined (ml/L)4,8 ml/L
Bloom bottle dose during pre-flowering (ml/L)1,5 ml/L
Formula and safety
NPK of the bloom bottle0-5-4
Phosphorus from the bloom bottle, P2O5 (%)5 %
Classification of the flowering bottleUncategorised
Oxidising concentrate, statement H272No
DualPart BloomRecommended
Pour-top bottles
Bottles to use during growth2
Bottles to use at pre-flowering2
Bottles to add at flowering2
System available in soft water and hard water versionsYes
Doses in hydroponics
Dose of the bloom bottle at peak flowering (ml/L)3 ml/L
Total added at full flowering, all bottles combined (ml/L)4,5 ml/L
Bloom bottle dose during pre-flowering (ml/L)2,5 ml/L
Formula and safety
NPK of the bloom bottle1-6-4
Phosphorus from the bloom bottle, P2O5 (%)6 %
Classification of the flowering bottleUncategorised
Oxidising concentrate, statement H272No
Liquid bloom fertiliser in a single bottle, NPK 4-8-7
Pour-top bottles
Bottles to use during growth1
Bottles to use at pre-flowering2
Bottles to add at flowering1
System available in soft water and hard water versionsNo
Doses in hydroponics
Dose of the bloom bottle at peak flowering (ml/L)2,5 ml/L
Total added at full flowering, all bottles combined (ml/L)2,5 ml/L
Bloom bottle dose during pre-flowering (ml/L)1 ml/L
Formula and safety
NPK of the bloom bottle4-8-7
Phosphorus from the bloom bottle, P2O5 (%)8 %
Classification of the flowering bottleDanger, H272 and H318
Oxidising concentrate, statement H272Yes
Formulas: Terra Aquatica labels and official shop. Doses: 2025 feeding chart, hydroponics and coco fibre column. Classifications: French safety data sheets. Recorded on 7 October 2026.
Help choosing
Which fertiliser system for your flowering stage
Documents & manuals
Safety data sheet for the bloom fertiliser
The data sheet details the composition, storage and first aid information for the concentrate.
Document not showing? Some publishers block display inside a frame, so open it in a tab.
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Frequently asked questions
6 questions
6 key questions
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