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Cubrosa | Onyx Dusk – 55cm Extra Large Concrete Cube Planter – 115L Square Plant Pot
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Key Features
Extra Large Cube Planter – Ideal for Feature Shrubs, Compact Trees & Structural Plants
Bring bold, geometric impact to courtyards, terraces and landscaped gardens.
A sculptural square planter that blends premium materials with strong architectural form — crafted from heavy-duty pigmented concrete for enduring style and performance.
- 115L capacity – ideal for feature shrubs, ornamental trees, and layered displays
- 55cm × 55cm × 55cm – with a wide 48.5cm planting opening for easy access
- Crafted from premium pigmented concrete – no paint, no peeling, no fading
- Indoor & outdoor use – sealed internally and resistant to both frost and UV
- Pre-drilled drainage holes – support root health and easy water management
- Heavy-duty & secure – 33.5kg empty weight with steel reinforcement for added strength
- No assembly required – arrives ready to style and plant
- Low-maintenance – simply wipe clean; no sealing or treatment needed
- Flat base – sits solidly on all level surfaces
Tip: Always position your Cubrosa planter in its final location before filling to avoid heavy lifting later.
Why Choose the Cubrosa Cube Planter?
- Premium pigmented concrete – colour runs through the body, so it won’t chip or flake
- Strong architectural cube shape – perfect for modern or minimalist spaces
- Generous 115L volume – supports deep root growth for healthy, mature plants
- Raw, hand-finished texture – natural pitting and organic character ensure every piece is unique
- Steel-reinforced structure – engineered to resist damage in high-use areas
- Frost-proof and UV-stable – made to last through all seasons
- Colour integrity – Onyx Dusk blends charcoal, black and grey tones that stay rich over time
- Sustainably crafted – handmade by artisans using low-waste methods for long-term use
Full Description
Introducing the Cubrosa – a minimalist cube planter engineered for bold outdoor statements. This 55cm square vessel balances contemporary style with strength and scale, offering a geometric alternative to traditional round pots. Its clean lines and solid build make it ideal for structured planting — from low clipped shrubs to striking evergreen forms.
Handcrafted from premium pigmented concrete and reinforced with internal steel, the Cubrosa planter is built for real-world durability. The raw finish showcases gentle pitting and tactile surface character, while the embedded Onyx Dusk pigment — a deep fusion of charcoal, black and grey — ensures the colour stays consistent and won’t peel or fade.
Designed for both private and commercial settings, the Cubrosa’s 33.5kg weight gives it natural resistance to movement and theft. It’s frost-resistant, UV-stable, and internally sealed to extend life and prevent moisture ingress — making it a year-round feature in all weather conditions.
Whether used solo, in pairs, or as part of a grid layout, the Cubrosa delivers sculptural simplicity with serious planting performance.
Our pots are crafted from pigmented concrete and intentionally celebrate the beauty of raw, natural materials. Each piece features unique variations—subtle discoloration, small pits, fine crevices, and delicate hairline cracks and markings —that develop as part of the curing process. These imperfections are what give every pot its own character and charm, ensuring no two are ever exactly alike.
Measure First
Ensure the pots will fit through all access points, including doorways, gates, and pathways.
Consider the Weight
Many of our pots are heavy - some over 100kg - and are delivered on a pallet to the kerbside only.
You may need special equipment or assistance to help move your pot to their final location.
Inspect on Delivery
Check your items immediately upon arrival. Please take photos or videos when unwrapping to document any potential damage.
Handle With Care
Cutting the security straps of the item confirms acceptance. Once opened, full refunds are no longer available.
Returns Policy
We accept returns of unopened, undamaged items. Costs of return delivery will be deducted from your refund which can be up to £100 depending on location.
Larger Items
- Larger items are delivered palletised to kerbside via a specialist carrier.
- We require a solid, flat surface to safely unload using a pump truck.
- Delivery is to ground-level only and cannot be made on steep inclines.
- Please ensure your delivery location is accessible and level to avoid delays.
Positioning & Surface Protection
- Place on a level surface: Ensure your planter is positioned on stable, level ground to prevent tipping or uneven weight distribution.
- Use rubber feet or pot risers: Elevate your planter slightly with rubber feet or spacers. This improves drainage, prevents waterlogging, and protects the surface underneath from staining or damage.
Drainage & Soil Preparation
- Create a drainage layer: Fill the bottom 10% of the pot with drainage materials such as gravel, broken terracotta, or even clean plastic bottles. This encourages water flow and prevents root rot.
- Avoid overfilling with soil: Fill your planter 80-90% full with high-quality soil or compost. Leave room at the top to allow for watering and mulch if needed.
Tree & Plant Selection
- Choose suitable species: Only plant trees and shrubs that are suitable for container growth. Select species with compact or non-invasive root systems to avoid cracking or damaging the pot over time.
Weather Protection
- Frost protection in winter: Although our planters are sealed and frost-resistant, we recommend protecting them during extreme winter conditions. Use breathable covers or move planters to a sheltered location to prevent frost damage.
Indoor Use
- Seal around drainage bung if needed: For indoor placement, we suggest sealing around the temporary drainage bung before filling to prevent leaks. Use silicone or a waterproof sealant if required.
- We advise placing the pot on rubber pot feet or a rubber mat to protect floors
Full Specifications
◎ Height: 55 cm
◎ Width: 55 cm
◎ Depth: 55 cm
◎ Weight: 33.5 kg
◎ Pot Material: Premium Cement Stone
◎ Colour: Onyx Dusk (charcoal, black, grey)
◎ Suitable For: Indoor and Outdoor Use
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