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Specifying outdoor planters for a public or commercial environment is a different task from choosing garden planters. Outdoor planters in town centres, retail parks, and public spaces need to perform: material weight, vandal resistance, fixing method, drainage, and DDA compliance all factor into the decision before you even get to aesthetics. This guide covers what you need to know when specifying commercial planters for a public realm project, from material selection through to supplier criteria.
Quick answer: Start with the material; concrete for permanent pedestrian zones, steel for contemporary colour-matched schemes, cast iron for conservation areas. Confirm the shape fits the site geometry, specify adequate soil depth for the planting scheme, and check fixing method, drainage, and DDA positioning before finalising.
What materials are available for commercial outdoor planters?
Broxap manufactures commercial planters across seven materials, covering the full range of settings, procurement criteria, and whole-life cost requirements you’re likely to encounter on a public realm project.
Concrete planters
Concrete planters are the standard choice for permanent town centre installations. They're the heaviest planter option available, making them a robust choice for public realm projects. In some cases, specially engineered and crash-tested concrete planters can also contribute to hostile vehicle mitigation (HVM) strategies, combining urban greening with enhanced security. Exposed aggregate and polished concrete finishes make them architecturally appropriate for a wide range of public realm schemes, and the material is genuinely low maintenance over its lifetime.
Steel planters
Steel planters are a strong choice for retail and commercial schemes where colour specification matters. They can be powder-coated in any BS or RAL colour, which makes them a practical option for BID-managed town centres where a consistent palette across all street furniture is part of the design brief. The finish holds well outdoors, and the contemporary profile sits cleanly alongside modern architecture.
Stainless steel planters
Stainless steel planters are the specification of choice for corporate campuses, transport interchanges, and premium retail environments. Corrosion resistance is the key property: stainless doesn’t require the same maintenance programme as mild and powder-coated steel, and the finish ages well in exposed or coastal locations. For projects where the planter will be on show for decades with minimal intervention, this is the material that earns its higher upfront cost.
Timber planters
Timber planters bring natural warmth to parks, heritage settings, and education environments. FSC-certified timber options are available, which can support responsible procurement policies. Timber does require periodic treatment to maintain its condition, so it's worth factoring that into whole-life cost comparisons against lower-maintenance alternatives.
Recycled plastic planters
Recycled plastic planters are rot-proof, graffiti-resistant, and require no ongoing treatment, making them the lowest whole-life-cost option across the range. They're increasingly specified on public sector schemes where sustainability and social value scoring form part of the procurement criteria, and they're a practical choice for school grounds and parks.
Cast iron planters
Cast iron planters are the default specification for heritage and conservation settings. Planning constraints in historic town centres often require materials that read as traditional, and cast iron meets that requirement without compromise. Weight is high, which also works in their favour on pedestrian-priority streets.
Fibreglass planters
Fibreglass is the lightest option across the range. Weight is the key advantage: where rooftop loading limits apply, or a temporary deployment needs to move on, fibreglass is often the only practical choice. Browse the fibreglass planter range to see what’s available.
What shapes and sizes of outdoor planters are available?
Shape selection is driven by the site layout and the visual intent of the scheme. Square and rectangular planters are the default for formal schemes and linear runs along building frontages, where clean geometry and a consistent rhythm work best.
Hexagonal planters suit junctions and standalone focal points where a standard rectangular unit would feel incongruous. Triangular and corner planters are designed for angular sites and building corners, filling space that other shapes can't. Modular planters offer flexibility for straight runs, L-shapes, and layouts that may need to adapt over time.
Capacity matters when you’re planting anything beyond seasonal bedding. Shrubs need considerably more soil volume than annual displays, and the same applies to trees. To give a sense of scale from Broxap’s own concrete planter range: the circular concrete planter runs to 325 litres capacity at 600mm height, while the King’s Lynn reaches 900mm high with a 1300mm diameter. If tree planting is part of the brief, specify accordingly and make sure the internal dimensions support the root ball you’re working with. Concrete and steel are the materials to specify for tree planters, both for structural strength and to bear the weight as the planting matures. Drainage is also critical: a waterlogged planter will lose the tree.
Where are outdoor planters specified?
The right outdoor planter for a given project depends on the setting. Here's how material choices typically map to common specification environments.
Town centres are the most common environment for commercial planters. Concrete and steel are the standard materials, with some concrete planters providing HVM capability alongside the greening function. Seated planter combinations are a useful option for town centres where seating provision is also part of the brief. In pedestrian zones, the passive security function of heavier concrete units is increasingly relevant to scheme designers.
Retail parks often have planters written into planning conditions as part of landscaping requirements. Entrance features benefit from modular or bold standalone units, and colour-matched powder-coated steel sits well alongside contemporary retail architecture. Schools and play areas tend to specify recycled plastic for its zero-maintenance credentials and sustainability story. Parks and open spaces suit timber, which weathers well and sits naturally in green environments. For transport hubs and corporate sites, stainless steel is the material that consistently meets expectations around finish quality and longevity. Conservation areas and historic town centres often require cast iron to satisfy planning constraints.
Broxap has manufactured street furniture in the UK since 1946 and delivers full design-to-installation capability across all materials. Quality, environmental, and health and safety management credentials are in place to support procurement processes across public and private sector clients.
What should a street planter specification include?
A complete specification for outdoor planters covers six main areas. Get these right and the rest of the decision is straightforward.
Material. Match the material to the setting, the procurement criteria, and the whole-life cost requirements. Concrete suits permanent installations; steel suits colour-matched contemporary schemes; recycled plastic suits sustainability-scored procurement; timber suits heritage and park settings.
Shape and soil capacity. Choose the shape that fits the site geometry. If trees or large shrubs are specified, confirm the internal volume will support the planting scheme before committing to a unit.
Fixing method. Freestanding units suit temporary or flexible deployments. Surface-mounted and root-fixed units give greater security in permanent pedestrian zone installations.
DDA and BS 8300 compliance. Planters that protrude into pedestrian areas must be positioned so they don’t create hazards for visually impaired users. Address this in the layout design, not as an afterthought.
Finish and colour. Steel and concrete can be powder-coated to BS or RAL specifications. For civic or BID projects where scheme identity matters, Broxap can match existing street furniture palettes and incorporate crests or logos.
Whole-life cost. The gap between materials narrows considerably once maintenance is factored in. Recycled plastic needs no treatment; concrete and steel need minimal upkeep; timber requires periodic work. On projects with tight maintenance budgets, that difference matters more than the purchase price.
Which suppliers should you consider for outdoor planters?
When selecting a supplier for a commercial planter specification, the criteria worth applying are: material range, in-house manufacturing capability, colour-matching service, installation offering, and a track record in public realm projects.
Two suppliers worth considering alongside Broxap are Furnitubes and Iota Garden. Furnitubes has a strong public realm portfolio: their RailRoad planter was used at the Bullring in Birmingham, and their AKRI range has been specified at Strand in London. Iota Garden focuses on contemporary commercial designs with a clean product range. Both are credible choices depending on the project type.
Broxap covers seven materials across all the main planter shapes, seated planter combinations, BS/RAL colour matching, and the option to incorporate custom crests and logos for civic identity schemes. Design, manufacture, and installation are all handled in-house. The business has been family-owned and UK-based since 1946, which matters for lead time reliability and ongoing aftersales support.
Specifying outdoor planters for a town centre, retail park, or public space? Browse the full planter range or get in touch to request a specification quote.
Frequently asked questions
How do I specify street planters for a town centre
regeneration scheme?
Start with the material that matches the setting and existing street furniture. Concrete planters are the standard for permanent town centre installations: the heaviest and lowest-maintenance. Steel suits contemporary schemes with colour-matching requirements. Timber works for heritage settings. Consider size and soil volume for the planting scheme, drainage provision, fixing method (surface-mounted or sunken for permanent sites), and DDA compliance. Broxap manufactures commercial planters in seven materials with full design-to-installation capability across the UK.
What are the best materials for commercial planters in
public spaces?
Concrete and steel are the most commonly specified materials for the public realm due to weight, durability, and vandal resistance. Recycled plastic planters are increasingly specified where sustainability procurement criteria apply. Stainless steel suits corporate and transport settings. Timber provides warmth for parks and heritage environments. Cast iron matches conservation areas. Fibreglass is the lightest option for rooftop or temporary installations.
What size planters do I need for tree planting in public
spaces?
Tree planters need a minimum internal depth of 600mm and sufficient soil volume for root growth, typically 500 litres or more depending on species. Concrete and steel planters are the best materials for tree-weight planters due to structural strength. Drainage is critical to prevent waterlogging.
Can outdoor planters be used as vehicle barriers in
pedestrian zones?
Outdoor planters can help define and protect pedestrian spaces, but not all planters are designed to function as vehicle barriers. Where hostile vehicle mitigation (HVM) is required, purpose-designed and independently tested security-rated planters may be specified as part of a wider security strategy. These solutions can combine urban greening with protective measures, often alongside other security features such as bollards, depending on the site-specific risk assessment.
What is the difference between commercial planters and
garden planters?
Commercial planters are designed for public and high-traffic environments: heavier construction, vandal-resistant fixings, commercial drainage systems, and materials rated for decades of outdoor exposure. Garden planters are lighter, designed for domestic use, and not suitable for public realm specification. Broxap's street furniture planters are built specifically for commercial and public environments.
How do recycled plastic planters compare to concrete and
timber?
Recycled plastic planters are rot-proof, graffiti-resistant, and require no ongoing treatment, making them the lowest whole-life-cost option. They're lighter than concrete but heavier than fibreglass. They support sustainability and social value scoring in public sector procurement, which makes them a strong choice for school grounds, parks, and publicly funded regeneration schemes.
Do I need planning permission for commercial planters in
a town centre?
Freestanding outdoor planters on public highways typically require a licence from the local highways authority rather than planning permission. In conservation areas or near listed buildings, planter material and finish may require approval from the local planning authority. Always check with the relevant authority for site-specific requirements before finalising the specification.