1 L bottle of flower and fruit biostimulant, pink label

500 ml bottle of seaweed-based bloom stimulator

5 L container of flower and fruit biostimulant, 5 L for 1,000 L

Organic bloom stimulator in 500 ml, 1 L and 5 L

Back of the flower and fruit biostimulant label: properties and dosage of 10 ml per 2 L

Flower and fruit biostimulant poured into a measuring jug in front of flowering tomato plants

Liquid organic bloom booster for flowers and fruit

14,90 €

Packaging	Price	Price per L	vs 500 mL
500 mL	14,90 €	29,80 €	—
1 L	21,90 €	21,90 €	−27 %
5 L	81,90 €	16,38 €	−45 %
10 L	140,90 €	14,09 €	−53 %

4,96 € × 3 with no fees Klarna.

This liquid plant-based biostimulant, derived from Ascophyllum nodosum seaweed extract, supports your plants from pre-flowering through to fruit ripening, in soil, coco fibre, and hydroponics. It is dosed at 5 ml per litre, in addition to your flowering fertiliser.

Suitable for use in organic farming, it is sold under the label "Biostimulant fleurs et fruits".

Ref. TA-BLOOM-500·Biostimulant

Packaging : 500 ml

500 mL

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The summary

What you receive: a bottle of liquid biostimulant based on seaweed extract, labelled "Biostimulant fleurs et fruits".
When to use it: from pre-flowering through to fruit ripening, up to the final flush.
The dose: 5 ml per litre of nutrient solution or irrigation water, 3 ml per litre as a foliar spray.
How to choose: it complements your organic bloom fertiliser without replacing it — add 5 ml per litre to the same water.

Seaweed-based biostimulant for flowering and fruiting, used alongside the fertiliser

Flowering is the stage at which a plant commits the most resources, as it forms its blooms, then its fruits and seeds. This liquid flowering stimulator does not replace the fertiliser that supplies the nitrogen, phosphorus and potassium needed at this stage. It works alongside it, as a plant-based biostimulant derived from a cold-pressed extract of the brown seaweed Ascophyllum nodosum. Add it to your nutrient solution or watering water from the moment the first buds appear, right through to the final weeks before harvest.

🌸 What a seaweed extract provides

The seaweed Ascophyllum nodosum, which grows on the rocky coastlines of the North Atlantic, naturally contains complex sugars, amino acids, and trace elements, preserved through cold extraction. Used at low doses, these extracts support the plant's own processes rather than feeding it directly, which is why they are classified as biostimulants, regulated in France under decree no. 2016-532. The bottle therefore shows no nitrogen, phosphorus, or potassium content, and you continue using your usual bloom fertiliser at its standard dose.

💧 The dose and the period

The dose is 5 ml per litre of solution or irrigation water, 10 ml for 2 litres. Start at pre-flowering, when the first flower buds begin to form, then continue throughout flowering and fruit ripening at the same dosage. Stop applications at the final flush, which you carry out using the flushing solution in the days leading up to harvest. When applying as a foliar spray, reduce the dose to 3 ml per litre and limit use to the pre-flowering stage, as moisture on open flowers encourages mould. At 5 ml per litre, the 1-litre bottle prepares 200 litres of solution.

Combining the biostimulant with an organic bloom fertiliser

This biostimulant does not supply the nutrients the plant needs to form its fruit, and should therefore be used alongside a fertiliser. The organic flowering fertiliser NPK 2-3-4, also of plant origin, is dosed at 2 ml per litre in the same water. This keeps your entire crop suitable for organic farming, from pre-flowering through to harvest.

Do not combine two flowering stimulators

The growing programme calls for this biostimulant or its concentrated equivalent, but never both at the same time. Two flowering stimulators in the same solution add nothing extra and make electrical conductivity harder to manage. Adjust the pH to between 5.5 and 6.5 after adding all your products, then measure the conductivity last. Shake the bottle before each use, as the extract settles to the bottom.

With a mineral fertiliser

It is added to a mineral bloom fertiliser, in hydroponics or on coco coir, at 5 ml per litre, without changing the fertiliser dose.

With an organic fertiliser

In organic growing, it complements a liquid plant-based fertiliser in the same watering can, in soil and in bioponic systems alike.

As a foliar spray

At 3 ml per litre, it is sprayed onto the foliage during pre-flowering only, with a conductivity below 0.6 mS.

🍓 Suitable crops

It is suitable for all plants grown for their flowers or fruit. Tomatoes, peppers, chillies, aubergines, strawberries and cucumbers are the primary beneficiaries in the kitchen garden, as are flowering ornamental plants grown in pots. It can be used in soil, compost, coco fibre, hydroponics and bioponics, at the same dose. Leafy vegetables, harvested before they flower, have no need for it. For tomatoes, the application period begins with the first flower truss and continues for as long as fruit is setting.

📦 Sizes and storage

The product is available in 500 ml and 1 litre bottles, and in 5 and 10 litre containers. It is a dark brown liquid with a faintly sulphurous smell, fully soluble in water, with a pH of 4.9 before dilution. Its safety data sheet does not classify it as hazardous. It keeps for 2 years from the date of manufacture, stored in a cool, dry place in its sealed container, above 5 °C. To monitor your inputs, a drop pH test kit lets you check the solution after each addition.

Technical specifications

The formula

Nature: Liquid biostimulantCompliant with decree no. 2016-532
Active ingredient: Ascophyllum nodosum extractObtained by cold pressing
Synthetic hormones: None
Organic farming: Suitable for useRegulations (EU) 2018/848 and 2021/1165

Use

Dose in solution: 5 ml per litreThat is 10 ml per 2 L
Foliar spray: 3 ml per litrePre-flowering only
Period: Pre-flowering to ripening
Crops: Soil, coco fibre, hydroponics, bioponie
Solution pH: 5.5 to 6.5Conductivity measured last
Yield: 1 L per 200 L of solution

The bottle

Appearance: Dark brown liquidConcentrate pH: 4.9
Hazard classification: Not classified as hazardous
Storage: 2 years after manufactureKeep cool, above 5 °C
Manufacturing: France

To budget for separately

Bloom nutrition: An organic flowering fertiliser
pH measurement: A pH test kit in drops

8 further specifications are available in the detailed view.

In the box

1 bottle of flower and fruit biostimulant, in your chosen size: 500 ml, 1 L, 5 L or 10 L

Composition, status, doses, period of use, storage and classification recorded on 01/10/2026 from the product data sheet, the label, the 2025 feeding chart and the manufacturer's safety data sheet.

Biostimulant or flowering fertiliser?

Both are used from pre-flowering through to ripening. The first supports flowering without feeding the plant, while the second supplies the nutrients needed for fruit development.

Are you deciding between these two bottles? One feeds flowering, the other supports it without adding fertiliser. Three questions are enough to decide.

	Nature	NPK input	Dose	Period	Replaces bloom fertiliser	Organic farming
Recommended Liquid organic bloom booster for flowers and fruitYour choice	Seaweed-based biostimulant	None declared	5 ml per litre	Pre-flowering to ripening	No	Suitable for use
Liquid organic bloom fertiliser, NPK 2-3-4Your choice	Organo-mineral fertiliser	2-3-4	2 ml per litre	Pre-flowering to ripening	Yes	Suitable for use

Liquid organic bloom booster for flowers and fruitRecommended

NatureSeaweed-based biostimulant

NPK inputNone declared

Dose5 ml per litre

PeriodPre-flowering to ripening

Replaces bloom fertiliserNo

Organic farmingSuitable for use

Liquid organic bloom fertiliser, NPK 2-3-4

NatureOrgano-mineral fertiliser

NPK input2-3-4

Dose2 ml per litre

PeriodPre-flowering to ripening

Replaces bloom fertiliserYes

Organic farmingSuitable for use

Compositions, doses and periods recorded on 01/10/2026 from the data sheets, labels and manufacturer's 2025 application chart.

Documents & manuals

Safety data sheet, in French

The data sheet details the plant-based composition, the non-hazardous classification, and the storage conditions of the biostimulant.

PDF · 0,2 Mo

Download

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delivery time

Bottle dispatched by tracked parcel from France. 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 are the responsibility of the recipient.

Frequently asked questions

6 questions

6 key questions

Are Bloom Booster and Biostimulant fleurs et fruits the same product?

From when should you use it, and until when?

Can it be combined with another bloom stimulator?

My leaves are yellowing during flowering – is it the product?

How do you use it as a foliar spray?

Should you reduce the fertiliser when adding it?

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Liquid organic bloom booster for flowers and fruit

The summary