No. There is no nozzle and no mist: the pump pours the solution over the top and the water trickles down by gravity past the roots. It is a gravity-fed cascade over grow medium, which also explains why your baskets need to be filled with clay pebbles or rockwool cubes.

Two-column hydroponic system mounted on its reservoir with castors, overall view on a white background

Parcel contents: delivery pipe, submersible pump, mains adapter, mechanical timer and detail of a braked castor

Two-column hydroponic system filled with lettuces and strawberry plants, set up along an indoor wall

Two-column hydroponic system on wheels on an urban balcony, in full production

Dimensioned diagram of the two-column hydroponic system: height 165 cm, width 80 cm, depth 20 cm

Chart of the mass to be pushed on the four castors: 12 kg empty, 27 kg half full, 42 kg with a full reservoir

Hydroponic system on castors, 56 plants

Name: Hydroponic system on castors, 56 plants
SKU: c862d33a-0a24-434e-b223-d42852f89efa
Price: 382.0 USD
Availability: InStock

$382.00

$127.33 × 3 with no fees Klarna.

Two vertical arches of 28 planting positions sit on a 30-litre reservoir mounted on four castors, two of them with brakes. You wheel it into the sun in April, bring it indoors before a frost and shift it aside to wash the patio.

The submersible pump and the mechanical timer are included in the box: the watering cycle is set without any smart plug.

Ref. c862d33a-0a24-434e-b223-d42852f89efa·Hydroponic tower

Colour : White

White

Customer support 7 days a week by email

Delivery within 2 to 15 business days

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The summary

What you receive: two columns of 28 planting slots, a 30-litre reservoir on four castors, a submersible pump with its adaptor, a mechanical timer and the delivery pipe.
What sets it apart from a tower: two columns side by side, which do not shade each other when the light comes from the front.
What mobility changes: 12 kg empty, about 42 kg with a full reservoir. It can be wheeled from one room to another, from a terrace to a shelter.
How much daily effort: 3 actions of 10 seconds each: listen for the water, check that both tops are trickling, look at the reservoir level.
What is already sorted: the pump and the mechanical timer are in the box, and the watering cycle is set without a smart plug.
What is sent to you: a single 12 kg (net) parcel, for self-assembly, shipped by courier to your door.

Two columns of 28 plants on a 30-litre rolling reservoir, pump and timer included

The hydroponic system on castors, 56 plants, is a growing tower made up of two columns of 28 planting positions mounted on a 30-litre reservoir. These side-by-side columns do not shade each other when the light comes from the front. It weighs about 42 kg with a full reservoir and moves on four castors, two of them with brakes.

The system consists of two white tube columns, each with 28 planting positions, mounted on a rectangular 30-litre reservoir fitted with four castors. The submersible pump sends the nutrient solution to the top of both columns through the connecting tube, from where it trickles past the roots before falling back into the reservoir. It is a gravity-fed cascade over grow medium: there is no nozzle and no mist, and nothing to spray.

🛞 Moving the system under load

The reservoir is mounted on four castors, two of them with brakes. You push the system into the sun in April, bring it under shelter before a forecast frost, shift it against a wall to wash the terrace, and take it out of the conservatory when the temperature there reaches 40 °C in August. The frame weighs 12 kg empty, and 30 litres of water add 30 kg: you are therefore pushing about 42 kg with a full reservoir, before the grow medium and before the plants. That is manageable with one hand on flat tiles, much less so over a door threshold or a loose decking board. Two habits follow from this: lock the two braked castors as soon as the system is in place, and drain the reservoir before a long move or before going over a step. The frame is only 20 cm deep: stored against a wall, it takes up very little room.

Measure pH, conductivity and temperature in a single step

A 30-litre reservoir feeding 56 plants is best monitored by measurement, and the ARKA myAqua pH, EC and TDS tester gives you the three useful values from a single probe dipped in the water. You read the pH and conductivity after each top-up, which tells you whether to correct the solution or replace it. The temperature shows on the same screen, and in summer it is what warns you, before the roots are damaged, that it is time to move the system into the shade.

A solution below 22 °C, especially in summer

Above 23 °C in the solution, the risk of root rot rises sharply: roots that are already infected look healthy at 16 or 18 °C, then brown quickly when the temperature climbs. Lettuce, spinach and rocket are sensitive to it. Aim for a solution below 22 °C, never leave the reservoir in full sun, and use the castors to move it into the shade. This is also why 30 litres is better than a small tub, since a large volume warms up more slowly.

🥬 Crops and where they go

The 56 planting spaces take whatever grows quickly and roots finely: salad leaves, baby leaves, herbs and strawberries, which fit in a basket a few centimetres across and complete their cycle in a few weeks. Where each plant goes is decided by light, because the top of the columns stays better lit than their base. So keep the top for lettuces, basil and strawberries, which need the most light, and leave the bottom for parsley, chives and mint, which cope with less. On a system of this type, a lettuce can be harvested 21 to 30 days after planting out, against 35 to 60 days in open ground, so your planting spaces turn over several times a season. Outdoors, in the height of the season, the sun provides; indoors, a lettuce needs in the order of 12 to 17 moles of light per square metre per day, which a room, even a bright one, will not supply without horticultural lighting.

Salads and baby leaves

Lettuce, spinach, rocket and lamb's lettuce complete a cycle in 4 to 6 weeks, and are harvested leaf by leaf or as a whole plant.

Herbs

Basil wants the high slots; parsley, chives and mint tolerate the low slots and can be cut as you go.

Strawberry plants

A low-growing plant with fine roots, the strawberry bears fruit light enough for the high positions.

Root crops and large fruiting plants

Carrot, beetroot and large-fruited tomato fail. The taproot hits the bottom of the basket, or the plant acts as a lever and snaps.

📐 Two columns side by side

The 56 positions are divided between two columns of 28, standing at either end of the reservoir and joined at the top by the tube that distributes the water. On each column, the plants are stacked like a tower: those at the top receive more light and shade those below, hence the distribution of crops by height. Side by side, however, the two columns do not shade each other when the light comes from the front. The trade-off comes down to one figure: 80 cm of width on the floor to set aside, whereas a single column makes do with its own diameter.

🪛 Assembly and filling with water

The system arrives unassembled in a single box, and the columns are fitted onto the wheeled base before the reservoir is filled. The pump sits at the bottom of the reservoir, its delivery pipe connected to the linking tube that caps the two columns, and its adaptor plugs into the mechanical timer. Do a first test run with clear water: both tops should trickle at a comparable flow before you fill the baskets. Then prepare the solution, adding each fertiliser separately and stirring between additions. With TriPart Grow in full growth, dosed at 1.8 ml per litre, the 30-litre reservoir receives 36 ml of Micro, then 54 ml of Grow, then 18 ml of Bloom, in that order.

🌱 Filling 56 slots in waves

Filling all 56 baskets on the same day gives you 56 ripe lettuces in the same week, followed by an empty system. Seedlings are better started separately, in rockwool cubes or germination sponges, and join the columns at the stage of 2 to 4 true leaves, which is 3 to 4 weeks after sowing for a lettuce. By sowing 14 seedlings every 2 weeks, you fill the 56 positions in 4 waves, and each harvest frees up baskets for the next wave. The guide to spring seedlings explains this transplanting in small waves.

🔁 One reservoir, one pump, two columns

Both columns are fed by a single pump drawing from a single reservoir. That is simple to install, and it means that a pump failure stops all 56 plants at once. A cascade on grow medium tolerates a shutdown better than an aeroponic system: the clay pebbles or rockwool cubes hold water, and the margin before wilting is measured in hours. It shrinks when it is hot, when the wind blows through the baskets and when the plants are large. Your daily check comes down to 3 gestures of 10 seconds each: listening for the water falling back into the reservoir, checking that the top of both columns is trickling, and looking at the level. The top is the first to be served and the first to dry out, so it is the most reliable indicator of the pump's condition.

🔧 The faults that keep coming back

Clogging is the first of these faults. The water is distributed at the top through narrow openings. Three things can block them: limescale when the water is hard, poorly dissolved fertilisers tipped as powder into the reservoir, and fragments of root or grow medium drawn in by the pump. The warning sign to watch for is simple: one side stays dry while the other runs. The wrong reflex is to increase the flow; the right one is to take the distributor apart and rinse it, with white vinegar if the deposit is white and hard. Algae, meanwhile, never lack nutrients in a hydroponic circuit, only light: close the filling opening and the lid, which deprives them of that light.

🧽 Between two crops

When a batch is finished, empty the 30-litre reservoir and take the opportunity to rinse everything, because a system that has run for several weeks holds on to fragments of roots and an organic film. Rinse the reservoir and the columns several times, until the water no longer smells of anything, then take out the pump to clean its strainer and impeller. The distribution outlets at the top of the columns can be unscrewed and soaked in white vinegar if limescale has narrowed them. Before preparing the new solution, run the system for an hour with clean water.

🐟 Connecting to a pond

The system cannot be connected directly to a pond. A fish stock produces 250 to 300 g of solids per kilo of feed given, and these solids end up in the narrow distribution holes at the top of the columns: without mechanical filtration upstream, a settling tank or drum filter, clogging is a matter of weeks. You also have to strike a balance on pH, which plants prefer between 5.5 and 6.5 and fish prefer higher, the usual compromise lying between 6.4 and 7.5. It is feasible, and the article on aquaponics and hydroponics details what each one requires.

Technical specifications

The essentials

Growing positions: 56, or 28 per columnTwo vertical columns on the same reservoir, joined at the top by the connecting tube
Principle: Gravity cascade on grow mediumThe pump carries the solution to the top, from where it trickles down past the roots before falling back into the reservoir. No nozzle, no mist
Reservoir: 30 litresA large volume warms up more slowly, which limits the risk of root rot in summer
Material: White PVC tubesStructure and growing columns
Use: Indoor and outdoorOutdoors, choose a position that avoids permanent full south exposure
Assembly: Easy to assemble, no tools neededThe columns are assembled on the wheeled base before the reservoir is filled

Footprint, weight and mobility

Height: 165 cmTop of the columns, connecting tube included
Width: 80 cmThe two columns and their reservoir, side by side
Depth: 20 cmAlso allow the clearance needed to get behind it and top up
Empty weight: 12 kgFrame assembled, reservoir empty
Load-bearing weight: Around 42 kg12 kg of frame plus 30 kg of water, excluding grow medium and plants
Castors: 4, including 2 with brakesTo be locked as soon as the system is in place. With the reservoir empty, the structure is slender and moves more easily in the wind

Irrigation and crop management

Pump: Submersible, included3 to 12 volt power supply with its mains adaptor, placed at the bottom of the reservoir
Timer: Mechanical, includedSetting in 15-minute steps, enough to alternate watering and drying out without a smart plug
Delivery pipe: Flexible, suppliedIt connects the pump to the linking tube that caps the two columns
Feed: 3 to 12 VMains adapter supplied with the pump
Solution temperature: Below 22°CAbove 23 °C, the risk of root rot rises markedly on lettuce, spinach and rocket
Watering schedule: 15 min per cycleAlternating watering and draining set on the supplied timer, to be adjusted to suit the grow medium
Suitable crops: Leaves and herbsLettuce, spinach, rocket, lamb's lettuce, basil, parsley, chives, mint, and strawberry
Crops to avoid: Root crops and large fruiting plantsCarrot, beetroot and large-fruited tomato: the taproot hits the bottom of the basket or the plant acts as a lever

To budget for separately

Grow medium: Clay pebbles or rockwoolCoir is less suited to a basket with water flowing through it
Grow pots: Net potsMeasure the rim of the basket and the hole in the columns before buying in bulk
Nutrient solution: Growth fertiliser for soilless growingA single complete solution is enough for leafy greens and herbs
Seeds or plants: Salads and herbs56 slots fill in waves, to spread out the harvest

16 further specifications are available in the detailed view.

In the box

2 growing columns with 28 planting spaces
1 30-litre tank with its wheeled base
4 castors, 2 of them with brakes
1 submersible pump with its mains adapter
1 mechanical timer with 15-minute steps
1 flexible delivery pipe

Dimensions, weight and contents of the parcel recorded on 09/09/2026 from three matching descriptions. The flow and temperature guidelines are typical ranges.

Three ways to grow vertically

This system can be moved while loaded and arrives with its pump and timer; the two towers take up less floor space.

Mobility or height, depending on your space The two columns on castors hold 56 plants and can be pushed along with the reservoir full. A stationary tower rises higher on less floor space.

	Growing positions (plants)	Footprint width (cm)	Pump included	Timer included	Horticultural lighting	Castors	Reservoir	Moves when loaded	Two columns on a single reservoir
Recommended System on castors, 56 plantsYour choice	56 plants	80 cm	Yes	Yes	No	Yes	30 litres	Yes	Yes
Hydroponic growing tower, 20 to 44 plantsYour choice	44 plants	53 cm	No	No	No	No	53 cm base tank	No	No
Indoor hydroponic tower for 30 plants, LED lightingYour choice	30 plants	39 cm	Yes	No	Yes	No	10 litres	No	No

System on castors, 56 plantsRecommended

Capacity and footprint

Growing positions (plants)56 plants

Footprint width (cm)80 cm

What arrives in the parcel

Pump includedYes

Timer includedYes

Horticultural lightingNo

CastorsYes

What this involves

Reservoir30 litres

Moves when loadedYes

Two columns on a single reservoirYes

Hydroponic growing tower, 20 to 44 plants

Capacity and footprint

Growing positions (plants)44 plants

Footprint width (cm)53 cm

What arrives in the parcel

Pump includedNo

Timer includedNo

Horticultural lightingNo

CastorsNo

What this involves

Reservoir53 cm base tank

Moves when loadedNo

Two columns on a single reservoirNo

Indoor hydroponic tower for 30 plants, LED lighting

Capacity and footprint

Growing positions (plants)30 plants

Footprint width (cm)39 cm

What arrives in the parcel

Pump includedYes

Timer includedNo

Horticultural lightingYes

CastorsNo

What this involves

Reservoir10 litres

Moves when loadedNo

Two columns on a single reservoirNo

Locations and floor widths are taken from the three product pages, recorded on 09/09/2026. The modular tower comes in 5, 7 or 11 tiers, and the value given is that of the largest.

Estimate your
delivery time

A single parcel weighing 12 kg net, delivered to your door by courier. The system ships unassembled: columns, reservoir, wheeled base, pump, timer and pipe all travel in the same box. The exact shipping cost is shown in your basket.

Frequently asked questions

12 questions

6 key questions, 12 in the detailed view

Does it really move when it is full?

Yes, on a flat, smooth floor, and you need to know what you are pushing.

12 kgempty frame, without water

42 kgfull reservoir, excluding plants

On tiles or a wooden floor, 42 kg on four castors can be pushed with one hand. On gappy decking boards, a door threshold or gravel, empty the reservoir first: only 12 kg is then left. The plants add a few more kilos towards the end of the cycle.

Will my grow pots fit through the holes?

Look at the rim of your baskets rather than their trade name: it is the upper edge that holds the basket in place, and it is what must stand proud of the hole while the body passes through. A ruler laid across an empty slot gives you the answer in 30 seconds.

If you do not have the system yet, send us the reference of the baskets you have in mind via the contact page: the hole size is measured with a calliper on a unit in stock, and the reply reaches you before you order. The shop's slotted net pots are available in diameters from 3.5 to 14 cm.

Do the plants at the bottom grow less well than those at the top?

Yes, as with any vertical column. On each of the two columns, the plants are stacked: those at the top receive more light and cast shade on those below, so that the light received and the weight of the plants decrease from the top towards the base.

The two columns, side by side, do not shade each other when the light comes from the front. Keep the lower positions for tolerant herbs such as chives, mint and parsley, and keep the lettuces, basil and strawberry plants at the top.

Does the pump need to run continuously?

A single pump for both columns: is that a risk?

Yes, and it is better to know before you buy. One reservoir, one pump, two columns: if the pump stops, all 56 plants stop together, as there is no backup circuit.

What makes up for this is the principle. On a gravity-fed cascade, the grow medium in the baskets stays moist for several hours after the pump stops, whereas a bare-root system is at risk within tens of minutes. The margin shortens in strong heat, in wind, and when the plants are well developed. The check that takes 10 seconds a day: see whether the top of the two columns is trickling. It is the first place to be served, and so the first to give away a tiring pump.

Can I leave it outside all year round?

Outdoor use is possible, on three conditions.

Watch the exposure. Avoid permanent full-south exposure: white plastic ages faster in the sun, and the nutrient solution heats up.
Guard against frost. Water that freezes in a closed circuit cracks the pipes. Drain the tank and the pump before the first frost, or bring the system indoors; the castors are there for that.
Plan for the wind. The structure is 165 cm high and 20 cm deep, and the foliage acts like a sail. With a full tank, the low weight steadies it; with an empty tank and leafy columns, lock the brakes and stand the system against a wall if strong winds are forecast.

How long can I go away on holiday?

Less time than a 30 litre reservoir might suggest. Consumption depends on temperature, wind and the number of plants: a summer absence with 56 mature plants empties the reservoir much faster than a March absence with 20 young seedlings.

You can work it out at home in 2 days: mark the level, note the drop, divide the remaining volume. Before leaving, fill to the brim, move the system into the shade and out of the wind, and get someone to check in if you will be away for more than a few days.

One side no longer receives water, what should I do?

With the pump running, check whether the top of the other column is still flowing. If both are dry, the problem is the pump or its strainer, not the distribution.
Take the pump out and rinse its strainer: root fragments and bits of grow medium collect there first.
Take apart the upper distributor on the dry side and rinse it. A hard white deposit is limescale, and it dissolves in white vinegar overnight.
Reassemble and check that both tops trickle at a comparable flow.

The temptation to avoid is turning up the flow to force water through: it masks the blockage for a few days and simply moves it further along the circuit.

Is this aeroponics?

Can I connect it to my fish pond?

Not directly. The connection requires mechanical filtration upstream, a settling tank or a drum filter, otherwise the solids from the fish tank will clog the narrow openings at the top of the columns within a few weeks.

At a pH close to 7, the usual compromise with fish, iron becomes poorly available and young leaves turn yellow between the veins: a DTPA chelated iron remains stable in this range.

Which crops work in this system, and which don't?

Crop	On this system	Why
Lettuces, spinach, rocket	Yes	Short cycle, compact root system, habit suited to the basket
Herbs	Yes	Parsley, chives and mint tolerate the lower positions; basil needs the top of the columns
Strawberry plants	Yes	Trailing habit, best kept for the upper, well-lit positions
Tomatoes, peppers	Difficult	Bulky roots and heavy growth overhanging a basket just a few centimetres across
Carrots, radishes, potatoes	No	The part you eat forms underground, and there is no room for it

The season-by-season choice is detailed in the guide to what to grow in hydroponics.

Do I need extra lighting if I put it indoors?

Yes in most interiors, and this system has none. A room that looks lit to the eye is still very dark for a lettuce, which needs several hours of bright light a day. In front of a south-facing picture window, this works for a good part of the year; at the back of a living room, the plants become leggy and bolt.

That is precisely what the castors allow: move the system closer to the window in winter, and further away in summer when the sun beats down.

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Hydroponic system on castors, 56 plants

The summary