Pack contents: tray of cubes, rockwool, starter nutrition and pH adjuster

The one hundred and fifty rockwool cubes supplied

TriPart fertiliser dosage chart supplied in 500 ml format

250 g pot of Terra Aquatica pH correction powder included in the seedling and cutting pack

The 30 ml drop pH test supplied with the pack

Seedling and cutting pack: growing media and nutrition

Name: Seedling and cutting pack: growing media and nutrition
Brand: Terra Aquatica
SKU: TA-PACK-SB
Price: 54.9 EUR
Availability: InStock

54,90 €

~~62,10 €~~ 54,90 €

18,30 € × 3 with no fees Klarna.

This pack contains everything needed to produce already-rooted plants before placing them in a soil-free system: a tray of 24 cubes ready to sow and 150 rockwool cubes for the next stage.

The TriPart nutrition in three 500 ml bottles, the pH adjuster, and the test kit complete the set.

Ref. TA-PACK-SB·Soil-free growing kit

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The summary

What you receive: a tray of 24 germination cubes, 150 rockwool cubes, the TriPart Starter Kit in three 500 ml bottles, the pH adjuster in powder form and a pH test.
What you do with it: your own rooted seedlings, ready to move into a reservoir pot, an ebb-and-flow table or a gutter system.
Two supports, two uses: germination cubes for delicate seeds, rockwool for batches and for cuttings.
The starting dose: a quarter of the growing doses and a pH of 5.8 to 6.2. At this rate, the 500 ml bottles last a long time.
What comes next: the system that will house your seedlings, chosen according to the number of plants you want to grow at once.
How it arrives: about 4 kg, a light parcel that can go to a pick-up point.

Growing media, starter nutrition and pH control for raising your seedlings.

All soilless systems share the same requirement: they take plants that are already rooted, never bare seeds. This pack covers the stage before, the one where you lose the most plants and the cheapest one to equip for. Three things govern this stage: a medium that stays moist without becoming waterlogged, very dilute nutrition, and a pH within the useful range. You have all three in the box.

🧱 Two starter supports

The tray of 24 germination cubes arrives pre-moistened: you place the seed, moisten it and wait. These cubes are made of biodegradable organic fibres and can be transplanted as they are, into a slotted basket just as you would into open ground. The 150 rockwool cubes measure 2 x 2 cm and take over for larger batches and for cuttings, where you slide the stem into the slit in the cube. This mineral wool is inert and drains more freely, which makes it more forgiving of slightly generous watering. Wear gloves when separating it dry.

🧪 Feeding young seedlings

The TriPart range splits nutrition across three bottles, and each one carries a colour that avoids mix-ups when dosing. Micro, dark brown, supplies calcium, iron and trace elements: it is the only one of the three used from seedling to harvest. Grow, green, carries the nitrogen and potassium for growth. Bloom, pink, carries the phosphorus and potassium for flowering. You change the proportions through the cycle instead of changing product. The order of mixing matters as much as the dose: Micro first, in the water, then Grow, then Bloom, never one concentrate poured into another.

The tray of 24

These are 24 pre-moistened organic fibre cubes, to be sown as they are and transplanted without pricking out.

Rockwool

These are 150 mineral cubes of 2 x 2 cm, slit on top, for large batches and for taking cuttings.

Nutrition

Three TriPart bottles, Micro, Grow and Bloom, which cover the whole cycle from seedling to harvest.

The check

A pH corrector powder and a drop test, enough to measure and correct from the very first solution.

A damp cube, never soaked

A waterlogged cube deprives the seed of oxygen and makes the collar rot. The right setting is damp, never soaking: a cube that you squeeze should not run with water. It is the leading cause of failure, ahead of temperature and well ahead of seed quality.

A light above the tray as soon as the seedlings emerge

As soon as the first leaves appear, the tray needs strong light, placed a few dozen centimetres above the cubes. In spring, a well-exposed windowsill is enough; for the rest of the year, a light bar from our horticultural lighting range covers the whole length of the tray. It produces sturdy seedlings with firm collars, ready to join their soilless system.

💧 Dose and pH at start-up

A seed carries its own reserve and needs nothing during the first few days. A young root, on the other hand, burns easily in a solution that is too concentrated. Start at a quarter of the growing doses, increase gradually, and aim for a pH of 5.8 to 6.2. The corrector supplied is urea phosphate powder: dissolve it at a rate of 1 g per 5 to 6 litres of water, add this correction solution in small amounts, and wear gloves and goggles, as this product is corrosive. The drop test then gives you the reading, in daylight and against a white background.

🌡️ Germination, warmth and light

Two factors govern how fast seedlings emerge: warmth and light. Warmth comes first, as most vegetable seeds germinate between 18 and 24 °C, and a heat mat under the tray is better than a radiator, which dries out the air. Light only matters once the seedlings have emerged, but it then becomes urgent, otherwise the stems stretch within a few days and never straighten up again. To set up your seed-starting corner, our article on indoor seed-starting space covers the space, light and warmth. The one on germination failures reviews the most common causes, and getting your spring seedlings right gives the calendar.

Technical specifications

What the pack contains

Germination tray: 24 cubesBiodegradable organic fibres, pre-moistened. They are transplanted with the plant, without disturbing the roots.
Rockwool cubes: 150 units of 2 x 2 cmInert mineral wool, certified NF U 44-551. The stem of the cutting slides into the slot in the cube.
TriPart Starter Kit: 3 x 500 mlGrow in NPK 3-1-6, Micro for freshwater in 5-0-1, Bloom in 0-5-4. A 25 g sachet of corrector comes with the kit.
pH-down corrector in powder form: 250 gUrea phosphate, dissolved at 1 g per 5 to 6 L of water, then poured in small amounts.
Drop-based pH test: 30 ml, range 4.0 to 8.5Around 500 measurements. No calibration, no battery.
Total weight: approximately 4 kgLightweight parcel, which can go to a pick-up point.

Managing the start-up

Target pH: 5.8 to 6.2Outside this range, the young root cannot take up nutrients, whatever the dose.
Starting dose: A quarter of the growing dosesIncrease gradually, judging by how the plants look.
Mixing order: Micro, then Grow, then BloomEach one into the water, never one concentrate into another. Rinse the doser between bottles.
Transplanting guide: Roots visible beneath the cubeWhite and firm. 10 days for a lettuce, 3 weeks for a tomato.

Safety and handling

pH- corrector: Corrosive, category 1BDANGER signal word, H314 and H318 statements. Gloves and goggles when dosing.
Rockwool: Mechanical irritantGloves for separating the cubes while dry. Once soaked, they no longer release fibres.

To budget for separately

Seeds or mother plants: Your varietiesSeeds or cuttings taken from your own plants.
Light: A soft water sourceLight that is too intense dries out a young plant more than it helps it.
Heat: Around 20 degreesA heated mat comes in handy in a cool room or for an early start.
Humidity dome: A pierced sheet of clear film is enoughUseful for slow-germinating seeds, unnecessary for easy species.
Rooting hormone: OptionalDecisive on woody stems, unnecessary on species that root on their own.
Host system: A pot or a tableThis pack produces the plants, but it does not take them through to harvest.

10 further specifications are available in the detailed view.

In the box

1 tray of 24 ready-to-use germination cubes.
150 rockwool cubes for seedlings and cuttings.
1 TriPart Starter Kit: 3 bottles of 500 ml, Grow, Micro freshwater and Bloom, plus 1 25 g sachet of pH corrector.
1 tub of pH- powder corrector, 250 g, and 1 drop-type pH test, 30 ml.

NPK formulas and pH thresholds taken from the manufacturer's application table, size and certification of the cubes from its product sheet, on 08/10/2026. Starting doses at a quarter of the growing doses are a rule of thumb: adjust according to the appearance of your plants.

Where the plants you have grown will go

The three growing packs in the range, by the scale they can handle

Your rooted plants, and the pack that will house them The number of plants to install decides first: one or two large plants in the 45 L pot, about ten pots on the ebb-and-flow table, about twenty plants in the gutters.

	Plants grown side by side	Water reserve (L)	Principle	Timer	Electrical socket	Consumption (kWh/day)	Grow medium supplied	Nutrition supplied	Pots or baskets supplied
45 L hydroponic pot pack: nutrition and pH controlYour choice	1 to 2	45 L	Air emulsion, running continuously	None	Required	0,04 kWh/day	20 L of beads, depending on the version	3 x 1 L	1 grow tent
Flood table pack with 10 pots: system, grow medium and nutrientsYour choice	10	100 L	Flood and drain	Depending on the version	Depending on the version	0,007 kWh/day	50 L of coco fibre	3 x 1 L, or 2 for organic	10 fabric pots of 4 L
Hydroponic pack for 20 plants: system, grow medium and nutrientsYour choice	20	150 L	Gutter circulation	None	Required	0,38 kWh/day	10 L of clay pebbles	3 x 1 L	20 baskets of 8 cm

45 L hydroponic pot pack: nutrition and pH control

What you are growing

Plants grown side by side1 to 2

Water reserve (L)45 L

PrincipleAir emulsion, running continuously

Installation

TimerNone

Electrical socketRequired

Consumption (kWh/day)0,04 kWh/day

What the pack adds to the system

Grow medium supplied20 L of beads, depending on the version

Nutrition supplied3 x 1 L

Pots or baskets supplied1 grow tent

Flood table pack with 10 pots: system, grow medium and nutrients

What you are growing

Plants grown side by side10

Water reserve (L)100 L

PrincipleFlood and drain

Installation

TimerDepending on the version

Electrical socketDepending on the version

Consumption (kWh/day)0,007 kWh/day

What the pack adds to the system

Grow medium supplied50 L of coco fibre

Nutrition supplied3 x 1 L, or 2 for organic

Pots or baskets supplied10 fabric pots of 4 L

Hydroponic pack for 20 plants: system, grow medium and nutrients

What you are growing

Plants grown side by side20

Water reserve (L)150 L

PrincipleGutter circulation

Installation

TimerNone

Electrical socketRequired

Consumption (kWh/day)0,38 kWh/day

What the pack adds to the system

Grow medium supplied10 L of clay pebbles

Nutrition supplied3 x 1 L

Pots or baskets supplied20 baskets of 8 cm

Specifications taken from the datasheets of the three packs and from the manufacturer's parts catalogue on 08/10/2026.

Estimate your
delivery time

A light parcel of approximately 4 kg, suitable for collection point delivery. Exact shipping costs and final delivery times are shown 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

8 questions

6 key questions, 8 in the detailed view

What is the difference between the tray cubes and rockwool?

Feature	Cube tray	Rockwool
Ready to use	yes	needs soaking
Quantity	24	150
Seedlings	ideal	good
Cuttings	possible	ideal

How many plants can this pack produce, and do you need to supply your own seeds?

24cubes in the tray

150rockwool cubes

That makes 174 positions in total, to be spread over the season. Not all of them will produce a plant: a success rate of 8 out of 10 is already good for seedlings, and higher for cuttings of an easy species.

The seeds come from you: with this pack, you produce your own plants instead of buying pots. You put in your own seeds, or cuttings taken from your mother plants. Always sow more than you need: it is the number of successful plants that counts, not the number of seeds sown.

Can the pack also be used for cuttings, or only for seedlings?

It serves both purposes, which is what justifies the two supports. A cutting needs a cube that stays moist without drowning the base of the stem: the germination cubes in the tray suit it well, and rock wool does too, provided you wring it out first.

There are two differences in handling to be aware of. A cutting has no roots: it lives off its leaves for 2 to 3 weeks and tolerates full light poorly at the start. A seedling, on the other hand, needs light as soon as it emerges, otherwise it becomes leggy and never makes up the lost ground. Rooting hormone is not included in the pack and remains optional on herbaceous species.

Should you fertilise from the seedling stage?

What do you need to gather before sowing?

How long before transplanting?

The guide is not a length of time but a root: transplant when the roots come out through the bottom of the cube, white and firm. Depending on the species and the temperature, this ranges from 10 days for a lettuce to 3 weeks for a tomato, and longer for a woody cutting.

Transplanting too early means losing the root ball; too late, and the roots coil up and the plant stalls for a while after transplanting.

How long do the three 500 ml bottles last?

3 x 500 mlof nutrient supplied

a quarterof growing doses, at seedling stage

At these doses, and with the small volumes of water that 174 sites require, the Starter Kit comfortably covers the production of all 174 sites. You will have enough left to support the plants through the first weeks after transplanting, which is exactly when they need it most.

The hardness of your water matters far less at this stage than during growing: the plant lives first on the reserves in its seed, and the doses are a quarter of those for a mature crop. The Starter Kit supplied contains TriPart Micro in the soft water version; with very hard water, the thing to watch is not the Micro but the pH, which rises by itself in water rich in bicarbonates, and that is why the powder pH corrector is included in the pack.

Are any precautions needed when handling rockwool?

Wear gloves. Rock wool is a mechanical irritant: its fibres prick the skin and travel easily to the eyes at the slightest draught.

These 2 x 2 cm cubes are made of mineral wool at 99% dry matter and carry NF U 44-551 certification. Once soaked, they no longer release fibres and can be handled without discomfort: it is when dry, as you separate the cubes from the tray, that the precaution matters.

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Seedling and cutting pack: growing media and nutrition

The summary