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Flower box with trellis on a balcony

Updated: October 2026

You are on a UK balcony or a small roof terrace, looking at a listing that says 2 kg empty, or 25 kg empty, and a frame that stands 140 cm or 160 cm tall. That kilogramme is not the planted weight, and a tall screen is a sail. A flower box with trellis on a balcony is only plausible if you already know what the slab can carry, how water leaves the box, and whether you may fix anything to the building. The [flower box with trellis comparison](/hub/plant-accessories/flower-box-with-trellis) is the listing table. Planting steps sit on [how to plant a flower box with trellis](/hub/plant-accessories/flower-box-with-trellis/sub/flower-box-with-trellis-how-to-plant). We did not run a lab trial.

You are on a UK balcony or a small roof terrace, looking at a listing that says 2 kg empty, or 25 kg empty, and a frame that stands 140 cm or 160 cm tall.

Our top picks

MYMULIKE MYMULIKE (2-pack)

Best overall

MYMULIKE MYMULIKE (2-pack)
7.2/10about £29.99
View offer
CHEOAR CHEOAR (2-pack)

Best value

CHEOAR CHEOAR (2-pack)
6.6/10about £19.79
View offer
JQTOP JQTOP (58 in)

Alternative

JQTOP JQTOP (58 in)
6.1/10about £14.49
View offer
On this page
  1. 1.Weight is the planted box
  2. 2.Wind and a solid screen
  3. 3.Railings, drip trays and permission
  4. 4.When to stop

Weight is the planted box

The item weight on amazon.co.uk is the empty kit. Crevyteg and GarveeMore both list 25 kg before compost. The GiantexUK 180 cm trough lists 9.5 kg. The four plastic towers sit around 1.2–3.2 kg. None of those figures includes wet compost, a plant, or a tray of water. BBC Gardeners’ World makes the same point: wet compost is heavy, and a light pot still blows over unless it is fastened. The Royal Horticultural Society tells you to check the load before you fill a balcony or a roof garden. That check is the building, not a blog’s typical range. Some UK pages quote 150–250 kg per square metre as a rule of thumb. That range is not your balcony’s rating. Ask the freeholder, the managing agent, or a structural engineer if the terrace is a roof. ELEO puts a filled 80 cm railing box at about 20–30 kg on their figures. That is their guide, not a test of a 2.9 m privacy kit.

Wind and a solid screen

A trellis that is mostly holes lets wind through. A solid privacy panel does not. The RHS prefers mesh that filters wind on a balcony, and enough bulk in the container so the pot does not tip. Crevyteg’s UK review is the warning in this folder: the buyer lost two clip-on trellis pieces to wind within three weeks. The star line is 4.4 from three reviews. That is not a lab wind test. A light plastic tower is not safer because it weighs 2 kg empty. UK reviews on JQTOP and CHEOAR describe a collapse once tomatoes grow, and MYMULIKE reviews describe a top that comes apart when the tower is moved. Fasten a light pot if it sits on a windy slab, or choose a heavier trough that still drains. Crevyteg and GarveeMore are both 25 kg empty and about 1.6 m high. A face that size is a sail. If the site is open to the south-west, start with a low, drained box and a small mesh, not a 3 m run.
MYMULIKE MYMULIKE (2-pack)

Testsieger

MYMULIKE MYMULIKE (2-pack)
7.2/10about £29.99
View offer

Railings, drip trays and permission

Hang a box on the inside of the rail if you hang it at all. ELEO’s railing advice is to fix on the inside and add a storm restraint. A box on the outside can fall into a street or a neighbour’s plot. Outsunny is a wall rack, 16 cm deep. It is not a railing trough, and it still needs a fixing into something solid. Water will leave. The RHS asks for drainage on a balcony container. A drip tray that you empty is the neighbourly version of that hole. The GiantexUK 235 cm bed has an open bottom. Do not stand it on a tiled balcony and expect the flat below to stay dry. A reservoir tower still overflows if you keep filling the well. Permission is a lease question before it is a DIY question. The Consumer Rights Act 2015 covers goods that are faulty or not as described. It does not authorise a hole in someone else’s wall. Ask in writing. If the answer is no, keep the box freestanding, inside the rail.

When to stop

Stop if you cannot name the load, the runoff path, or the person who may approve a fixing. A balcony slab, a parapet, a rented wall, and masonry above a path are professional jobs. The plastic towers at about 1.2–3.2 kg empty are the plausible balcony sizes in this set, if you accept the joint complaints and you can brace them. The 25 kg privacy kits are the wrong first buy on a rented balcony.

Common questions

Are the 25 kg kits a balcony product?
Not as a first choice. Twenty-five kilograms is the empty Crevyteg and GarveeMore figure. The kits are about 2.9 m wide and 1.6 m tall. That is a screen, and a sail, before you add compost. Ask about the slab first. A 2 kg tower is a smaller bet if the answer is unclear.
Should the box hang outside the railing?
No. ELEO’s railing note is to fix on the inside and add a storm restraint. A filled 80 cm box can reach about 20–30 kg on their figures. A fall from the outside of the rail is a street problem, not a compost problem. Most listings in this set are freestanding anyway.
What do I do about water on the flat below?
Give the pot drainage, then catch what leaves. Empty a drip tray after rain. Do not stand the open-bottom GiantexUK 235 cm bed on a sealed balcony deck. A reservoir still overflows if you keep filling it. Stained render is a neighbour dispute you can avoid with a tray.
Do I need the landlord’s permission to screw in a trellis?
Yes, if the screw goes into the building. A rented wall, a shared parapet and cladding are not yours to drill. The Consumer Rights Act covers faulty goods. It does not cover a fixing you put into someone else’s wall. Ask in writing, or keep the box freestanding inside the rail.

Related pages

Flower box with trellis comparison

How to plant a flower box with trellis

Wood or plastic flower box with trellis

Best flower box with trellis for one named job

Flower box with trellis buying guide: soil first

Sources

Public UK sources used for this page. Shelf prices, stars and review counts are the amazon.co.uk figures captured for these listings, checked on 19 October 2026.

  1. RHS, Growing plants in containers (retrieved 19 October 2026)
  2. RHS, Roof gardens and balconies (retrieved 19 October 2026)
  3. RHS, Tomatoes: grow your own (retrieved 19 October 2026)
  4. RHS, How to plant a climber (retrieved 19 October 2026)
  5. British Clematis Society, growing in containers (retrieved 19 October 2026)
  6. Consumer Rights Act 2015, section 22 (retrieved 19 October 2026)
  7. GOV.UK, General Product Safety Regulations 2005 (retrieved 19 October 2026)
  8. Wilko, Samuel Alexander wooden trellis planter (retrieved 19 October 2026)