Container gardening is one of the most adaptable forms of horticulture — it works on a tenth-floor balcony, a suburban patio, a rooftop terrace, and a quarter-acre garden simultaneously. At 6BC Botanical Garden in New York’s East Village, we use container plantings throughout the garden to demonstrate what’s achievable in constrained urban spaces, and to show how material, scale, and plant selection interact to produce results that look deliberate rather than improvised.
What most container gardening guides skip is the decision framework that comes before choosing any specific planter: what material fits your climate and maintenance tolerance, what scale suits the space and the plant, what placement format matches the wall, rail, or floor you’re working with. Get those three decisions right and almost any planter will perform well. Get them wrong and even an expensive container will underdeliver.
This guide covers that framework. The linked guides below go deeper on each specific planter type — this page gives you the reasoning to choose between them.
Choosing the Right Container Material
Material is the most consequential decision in container selection because it determines weight, longevity, water retention, and how the planter weathers over time. The wrong material for your climate or maintenance habits creates problems that no amount of good planting can overcome.
Terracotta and concrete are the classic choices for permanence and authenticity. Terracotta is porous — it breathes, which benefits Mediterranean herbs (lavender, rosemary, thyme) and succulents that need soil to dry between waterings. The trade-off: it cracks in freeze-thaw cycles, making it a poor choice for permanent outdoor use in USDA zones 6 and below. Our guide to terracotta planters covers which pot sizes and glazing options perform best in different settings. Concrete is the heavy, permanent alternative — it handles freeze-thaw reliably and develops a patina that improves with age, but it’s effectively immovable once filled. See our concrete planter guide for the modern cast concrete options that suit architectural outdoor spaces.
Metal planters divide into two categories with very different long-term behaviour. Galvanized steel is durable, rust-resistant, and suits both raised bed formats and decorative containers — our galvanized planter guide covers the range from compact window boxes to full raised bed systems. Corten (weathering steel) develops a controlled rust patina that stabilises after 6–18 months — the result is a warm, textured surface that looks better in year five than year one. It’s the right choice for modern and industrial garden aesthetics. Our corten steel planter guide covers what to expect during the weathering process and which plant pairings suit the rust-orange patina best.
Wood planters bring warmth and organic texture that no synthetic material replicates. Cedar is the premium species — its natural oils provide genuine rot resistance without chemical treatment, and it weathers to an attractive silver-grey. Our cedar planter guide covers raised bed systems, entry planters, and ergonomic elevated designs. For a broader range of wood styles including hardwood bench-planters, rustic wagon formats, and driftwood-look resin alternatives, our wood planter guide covers what each material genuinely delivers outdoors over multiple seasons.
Fiberglass and plastic are the practical-performance materials. Fiberglass convincingly mimics stone, metal, or ceramic finishes at a fraction of the weight — the right choice when you want the visual weight of a large concrete urn without the structural reinforcement. Our fiberglass planter guide covers where fiberglass justifies its premium over standard resin. Plastic is the honest workhorse: lightweight, frost-resistant, and inexpensive enough to use generously. It suits nursery applications, balcony weight limits, and anyone who repots regularly. Our plastic planter guide covers the options that don’t look or feel cheap despite the price point.
Self-watering planters are less a material category than a format — the reservoir system is the feature. They suit balconies where daily watering isn’t practical, container tomatoes and strawberries that suffer from inconsistent moisture, and anyone who travels. Our self-watering planter guide covers which reservoir designs actually work and which are marketing features with limited real function.
Matching Container to Location
Where a planter lives determines what it needs to do structurally, aesthetically, and horticulturally. A balcony planter and a garden border planter have almost nothing in common beyond holding soil.
Floor-level outdoor placements — patios, decks, and garden borders — suit the widest range of planter types. Our patio planter guide focuses on containers that suit hardscape outdoor rooms where the planter is as much furniture as horticulture. Deck settings have similar needs but often with more load-limit awareness — our deck planter guide covers formats that distribute weight appropriately. For open garden settings where the planter sits in a planted border rather than on hardscape, our garden planter guide covers containers that suit loose, naturalistic contexts. For a broad overview of general outdoor planting, our outdoor planter guide covers the versatile formats that work across multiple settings.
Balcony and rail-mounted placements require specific thinking about weight, wind exposure, and mounting security. Our balcony planter guide covers the full range of balcony formats — railing-mounted, hanging, and floor-standing — with specific attention to load limits and wind hardiness. For rail-mounted planters specifically, our railing planter guide covers hook-on and bracket systems for different rail profiles. Fence-mounted planting is a different application — vertical garden surfaces rather than structural rails — covered in our fence planter guide.
Wall-mounted and window placements use vertical surface area that floor planters leave unused. Outdoor wall-mounted planters suit covered porches, garden walls, and exterior house walls — our outdoor wall planter guide covers the formats that mount securely and handle weather exposure. For indoor walls — living walls, stairwells, and interior feature walls — our indoor wall planter guide covers the lightweight systems designed for interior use. Window-mounted planters include the suction-cup and bracket-mounted formats for the window face itself — covered in our window planter guide — and the classic sill-sitting box formats in our window box planter guide. For overhead suspended displays from porch ceilings and pergolas, our hanging planter guide covers weight capacity, drainage management, and plant selection for the suspended position.
Scale, Height, and Format
Container scale is one of the most common mistakes in outdoor design — small pots in a large space look timid, and oversized containers in a compact setting feel oppressive. The right scale creates visual proportion between the plant, the container, and the surrounding space.
Large and statement scale planters anchor a space rather than accent it. Our large planter guide covers rain-harvest barrel systems, substantial raised growing beds, and statement entry urns that create visual presence at a garden’s focal points. For large outdoor planters specifically suited to open landscape contexts rather than enclosed patios, our large outdoor planter guide covers the formats that perform at landscape scale.
Tall planters create vertical emphasis — useful for privacy screening, architectural punctuation, and adding height to flat plantings. Our tall planter guide covers the range of tall container formats for mixed indoor and outdoor use, while our tall outdoor planter guide focuses specifically on weather-resistant options suited to year-round exterior placement.
Geometric formats — rectangular and square — suit formal, contemporary, and architectural garden styles where clean lines matter. Rectangular planters create linear emphasis and work well in rows for privacy planting or herb garden borders — see our rectangular planter guide. Square planters suit symmetrical entry arrangements, contemporary patio collections, and modern interior displays — our square planter guide covers the range from small ceramic specimens to large architectural formats.
Vertical growing formats maximise plant density in minimal floor space. Our stackable planter guide covers tower formats for herbs, flowers, and compact vegetables. For crop-specific vertical growing, our strawberry planter guide covers the pocket-format containers designed around strawberry crown density and runner behaviour.
Raised systems improve growing performance by elevating soil quality, drainage, and working height above ground conditions. Our raised planter guide covers the mobile wheeled formats, self-watering raised systems, and galvanized raised beds suited to patio and terrace food production. For dedicated kitchen garden installations, our raised garden bed guide covers the deeper, larger systems designed for serious vegetable production across multiple seasons.
Aesthetic Purpose: When the Container Is the Feature
Some containers are chosen primarily for visual character rather than horticultural function. Our decorative planter guide covers the ornamental pots, face planters, and sculptural formats that contribute as much to a space’s character as the plants they hold. For the genuinely unusual — novelty formats, conversation-piece designs, and containers that function as garden art — our unique planter guide covers the options that don’t fit conventional categories.
Soil, Drainage, and Seasonal Care: What Every Container Needs
The best container in the wrong growing medium will underperform every time. At 6BC, we use the same soil principles across every container type regardless of material or format.
Never use garden soil in containers. Garden soil compacts under repeated watering, loses structure within one season, and develops a perched water table at the container base that roots can’t penetrate. Container mix — specifically formulated for drainage and structure in confined volumes — is the baseline. For food production in raised beds, a one-third perlite, one-third coco coir, one-third compost blend provides the drainage, structure, and nutrition that native soil cannot.
Drainage holes are non-negotiable. Every container needs them, and they need to be adequate for the container volume — not merely present. A large planter with one small drainage hole waterlogged at its base while the surface appears dry is one of the most common causes of container plant failure. If a decorative container you love lacks drainage, use it as a cachepot with a nursery pot inside that does have drainage.
Match watering frequency to material. Terracotta and unglazed ceramic dry out significantly faster than glazed, plastic, or metal containers of the same size. In summer heat, a terracotta pot may need watering twice daily while a plastic equivalent needs watering every other day. Grouping containers by material makes watering routines more manageable — you water the terracotta group on one schedule, the self-watering planters on another.
Seasonal transitions require deliberate management. In spring, resist the urge to plant tender species before last frost — containers warm up faster than ground soil and encourage early growth that a late frost will damage. In autumn, move frost-sensitive containers under cover before the first hard freeze rather than waiting. In winter, ensure all containers either drain completely or are brought indoors — standing water that freezes will crack terracotta, damage wood, and stress roots in metal and plastic containers alike.
Feed containers through the season. Container soil depletes nutrients faster than open ground because watering leaches soluble nutrients through the drainage holes continuously. A slow-release granular fertiliser at planting, supplemented with liquid feed every two to three weeks through the growing season, maintains the productivity that container growing is capable of delivering.
Browse All Container Types
Use these guides to go deeper on the specific planter format that suits your space, plants, and aesthetic goals.
By material:
Terracotta ·
Concrete ·
Fiberglass ·
Corten Steel ·
Galvanized Metal ·
Cedar ·
Wood ·
Plastic ·
Self-Watering
By location:
Patio ·
Deck ·
Garden ·
Outdoor ·
Balcony ·
Railing ·
Fence ·
Wall (Outdoor) ·
Wall (Indoor) ·
Window ·
Window Box ·
Hanging
By scale and format:
Large ·
Large Outdoor ·
Tall ·
Tall Outdoor ·
Rectangular ·
Square ·
Stackable ·
Hanging ·
Raised ·
Raised Beds ·
Strawberry
By aesthetic purpose:
Decorative ·
Unique