Best Troughs For Garden Plants for Patios and Growing Beds

A strong garden trough gives roots enough room, suits its location, and provides a watering and drainage setup that fits your routine. For patios and porches, the Step2 Tremont Trough Planter offers two ready-to-use planters, each holding 59 dry quarts, with a water reservoir and internal drainage points. Other choices serve different needs: the Lechuza Trio Stone has three independently watered liners, while the Land Guard galvanized bed offers a much larger footprint for outdoor growing.

This roundup compares six options by their stated dimensions, capacity, material, and included features. Check measurements against your intended spot, and consider whether you need a compact window-box-style container, a freestanding patio trough, or a broad raised bed before choosing.

The Step2 Tremont Trough Planter is the best overall choice for gardeners seeking spacious outdoor troughs. Its two pre-assembled planters each measure 39.5 inches wide and hold 59 dry quarts, with a water reservoir and internal drainage points. That combination suits patio or porch planting while reducing the need for frequent watering.

Choose the Lechuza Trio Stone instead if three separate liners and water-level indicators matter more, or the Land Guard bed for a much larger garden-growing footprint.

Our Top Picks

Best Overall

Step2 Tremont Trough Planter

Two pre-assembled troughs each hold 59 dry quarts and include a water reservoir plus internal drainage points for patio or porch planting.

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Best White Trough

Step2 Wave Trough Planter

The two white planters each hold 57.8 dry quarts, measure about 39 inches wide, and combine a water reservoir with efficient drainage.

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Best Liner System

Lechuza Trio Stone

Three independent liners each have a water reservoir and gauge, while its 39-inch trough suits decks or wall and railing placement with separate brackets.

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• Best Modular Set TooCust Outdoor Planter Box

Compare these garden troughs by size and design

#	Product	Dimensions D x W x H	Capacity	Material	Buy
1	1. Step2 Tremont Trough PlanterBest Overall	16.75"D x 39.5"W x 14.5"H	2.3 cubic feet	Plastic	View on Amazon
2	2. Step2 Wave Trough PlanterBest White Trough	16.88"D x 39.29"W x 15.5"H	2.25 cubic feet	Plastic	View on Amazon
3	3. Lechuza Trio StoneBest Liner System	39"D x 14"W x 13"H	1.74 cubic feet	Polypropylene (PP)	View on Amazon
4	4. TooCust Outdoor Planter BoxBest Modular Set	19.7"D x 78.7"W x 15.7"H	395.8 liters	Strengthened PP	View on Amazon
5	5. Novelty Poly-Pro Flower BoxSlim Window-Box Liner	8"D x 35.75"W x 5"H	11 quarts	Plastic	View on Amazon
6	6. Land Guard Galvanized Raised BedLarge Galvanized Garden Bed	72"D x 36"W x 23.8"H	266 gallons	Metal	View on Amazon

Detailed Reviews: Best Troughs For Garden Plants

#1 · Best Overall

1. Step2 Tremont Trough Planter

• Dimensions D x W x H: 16.75"D x 39.5"W x 14.5"H
• Capacity: 2.3 cubic feet
• Material: Plastic

Best for: Self-Watering Patio Pair.

Why it ranks #1: Two pre-assembled troughs each hold 59 dry quarts and include a water reservoir plus internal drainage points for patio or porch planting.

A built-in water reservoir is the defining feature of Step2’s Tremont two-pack, helping reduce the need for frequent watering while adding planter stability. Each pre-assembled trough measures 39.5 inches wide and holds 59 dry quarts of soil, giving patios and porches substantial planting room without setup assembly.

Each of the two planters measures 39.5 by 16.75 by 14.5 inches, so the pair can provide coordinated planting space across a patio or porch. Their 59-quart soil capacity accommodates substantial arrangements, while the reservoir reduces frequent watering demands and can adapt to various watering systems. Internal drainage points help maintain even moisture around roots; the included plugs support the planter setup. Since the planters arrive pre-assembled, buyers can move directly to adding soil and plants.

Pros

• Two pre-assembled planters
• 59 dry quarts of soil per planter
• Water reservoir reduces frequent watering
• Internal drainage points help maintain even moisture

Cons

• Potting soil and plants are not included.

Skip it if you want white planters for a light-colored patio scheme; the Step2 Wave Trough comes in white and also includes a reservoir.

This pair suits gardeners furnishing a patio or porch who want large, pre-assembled troughs with reservoirs and internal drainage. Allow for each planter’s nearly 40-inch width, and source soil and plants separately.

Full product details

Brand	Step2
Capacity	2.3 cubic feet
Color	Onyx Black
Included Components	Planter, Plug
Item Dimensions	16.75 x 39.5 x 14.5 inches
Dimensions	16.75"D x 39.5"W x 14.5"H
Item Weight	29.8 pounds
Manufacturer	Step2 – Streetsboro – DROPSHIP
Part Number	554202
Material	Plastic
Model Number	554202
Special Features	Drainage Hole
Product Style	Trough
Size	2-Pack
Special Feature	Drainage Hole
Style	Trough

Listed on Amazon as: Step2 Tremont Trough Planter 2-Pack, Large Resin Planters for Outdoor Plants, Self-Watering, Black

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#2 · Best White Trough

2. Step2 Wave Trough Planter

• Dimensions D x W x H: 16.88"D x 39.29"W x 15.5"H
• Capacity: 2.25 cubic feet
• Material: Plastic

Best for: White Weatherproof Patio Pair.

Why it ranks #2: The two white planters each hold 57.8 dry quarts, measure about 39 inches wide, and combine a water reservoir with efficient drainage.

Step2’s Wave troughs arrive pre-assembled in a white, weatherproof two-pack, offering a ready-to-use option for outdoor patios and porches. Each planter holds 57.8 dry quarts of soil and includes a water reservoir that helps reduce frequent watering while contributing to planter stability.

At 39.29 inches wide, 16.88 inches deep, and 15.5 inches high, each trough offers a generous planting area without requiring assembly. The 57.8-quart soil capacity supports substantial arrangements, while internal drainage points help maintain even moisture for roots. A built-in reservoir reduces the need for frequent watering and is adaptable to various watering systems. The weatherproof plastic construction supports outdoor placement, and the two plugs are included for the pair.

Pros

• Two pre-assembled planters
• 57.8 dry quarts of soil per planter
• Reservoir reduces frequent watering
• Weatherproof plastic with internal drainage points

Cons

• The white finish may not suit gardeners seeking a darker planter.

Skip it if you prefer a dark planter for your patio; the Step2 Tremont Trough comes in black and offers a similar reservoir-based setup.

The Wave pair fits gardeners seeking white, weatherproof troughs for a patio or porch, with reservoirs and drainage points. Check that each nearly 40-inch-wide planter fits the intended spot before setting up.

Full product details

Brand	Step2
Capacity	2.25 cubic feet
Color	White
Included Components	Plug
Item Dimensions	16.88 x 39.29 x 15.5 inches
Dimensions	16.88"D x 39.29"W x 15.5"H
Item Weight	30.4 pounds
Manufacturer	Step2 – Streetsboro – DROPSHIP
Part Number	554702
Material	Plastic
Model Number	554702
Special Features	Weather Resistant
Product Style	Modern
Size	Large
Special Feature	Weather Resistant
Style	Modern

Listed on Amazon as: Step2 Wave Trough Planter, Large Planters for Outdoor Plants, Gardening and Flower Pot for Patio or Porch, Efficient Drainage, Durable Plastic, White, 2-Pack

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#3 · Best Liner System

3. Lechuza Trio Stone

• Dimensions D x W x H: 39"D x 14"W x 13"H
• Capacity: 1.74 cubic feet
• Material: Polypropylene (PP)

Best for: Water-Gauge Balcony Trough.

Why it ranks #3: Three independent liners each have a water reservoir and gauge, while its 39-inch trough suits decks or wall and railing placement with separate brackets.

Three independent liners, each with its own reservoir and water gauge, make the Lechuza Trio Stone easy to manage in separate planting sections. The 39-inch trough can sit on a deck as a floor planter or hang from a wall or railing with separately sold brackets, broadening placement options.

Each liner lifts out to simplify planting, while an individual water-level indicator shows when its reservoir needs refilling. The funnel system conveys water directly to plant roots, supporting a distinct watering workflow across the three sections. At about 39 by 14 by 13 inches, the planter offers a long trough profile for decks or window-box use. Frost- and UV-resistant polypropylene supports indoor or outdoor placement; hanging requires brackets, which are sold separately.

Pros

• Three independent liners with separate reservoirs
• Water gauges indicate when reservoirs need refilling
• Easy-to-lift liners simplify planting
• Frost- and UV-resistant PP; suitable for indoor or outdoor use

Cons

• Wall or railing installation requires separately sold brackets.

Skip it if you need wall-mount brackets included with the planter; the Step2 Wave is a floor-standing patio trough supplied pre-assembled.

Choose Lechuza for a deck or railing setup where three separately monitored liners and lift-out planting sections are useful. It also works as a floor planter; hanging buyers must obtain brackets separately.

Full product details

Brand	Lechuza
Capacity	1.74 cubic feet
Color	Gray
Included Components	Liner, LECHUZA PON
Item Dimensions	39 x 14 x 13 inches
Dimensions	39"D x 14"W x 13"H
Item Weight	28 pounds
Manufacturer	Lechuza
Part Number	15045
Manufacturer Warranty Description	1 year manufacturer guarantee.
Material	Polypropylene (PP)
Model Number	15045
Special Features	Drainage Hole
Product Style	Modern
Size	39" x 13" x 14"
Special Feature	Drainage Hole
Style	Modern

Listed on Amazon as: Lechuza Trio Stone 30 Stone Grey, Self-Watering Trough Planter, H13.4 L39.4 W12.6 in, 3 Liners

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#4 · Best Modular Set

4. TooCust Outdoor Planter Box

• Dimensions D x W x H: 19.7"D x 78.7"W x 15.7"H
• Capacity: 395.8 liters
• Material: Strengthened PP

Best for: Modular Deep-Root Set.

Why it ranks #4: The 78.7-inch-long set uses a tool-free DIY assembly and a two-layer self-watering design, offering a substantial option for adaptable garden layouts.

The TooCust set combines five planter boxes with a no-tools flexible assembly system, letting gardeners arrange a long growing area or customize its layout. Each box is listed at 15.7 inches square by 19.7 inches high, providing deep planting space, while a two-layer reservoir design supports self-watering.

The upper drainage-hole plate sits above a bottom water compartment, and a transparent plug cap lets growers monitor the water level. That setup helps manage watering while addressing the risk of root rot or over-drying described in the product details. Each planter’s 19.7-inch height offers room for roots, and the DIY system allows custom-sized arrangements without tools. The set of five is listed at 78.7 inches long overall, making it a substantial option for outdoor planting layouts.

Pros

• Set of five planter boxes
• 19.7-inch height for deeper root space
• Water compartment with transparent level-monitoring plug
• Flexible assembly creates custom layouts without tools

Cons

• The 78.7-inch overall length calls for a long, dedicated planting area.

Skip it if you need one ready-assembled trough instead of a customizable five-piece set; the Step2 Tremont arrives pre-assembled as a two-pack.

Choose TooCust if you want a deep-rooting setup with a configurable five-box layout and visible water-level monitoring. Its listed 78.7-inch length makes available space an important consideration before assembly.

Full product details

Brand	TooCust
Capacity	395.8 liters
Color	Brown
Included Components	Seeds
Item Dimensions	19.7 x 78.7 x 15.7 inches
Dimensions	19.7"D x 78.7"W x 15.7"H
Manufacturer	TooCust
Material	Strengthened PP
Special Features	Drainage Hole, Self Watering
Product Style	Garden
Size	78.7"(l) X 15.7"(w) X 19.7"(h)
Special Feature	Drainage Hole, Self Watering
Style	Garden

Listed on Amazon as: Large Planters for Outdoor Plants 20" Tall Planter Box, 78.7"L x 15.7"W

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#5

5. Novelty Poly-Pro Flower Box

• Dimensions D x W x H: 8"D x 35.75"W x 5"H
• Capacity: 11 quarts
• Material: Plastic

Best for: Slim Window-Box Liner.

Why it ranks #5: This lightweight, recyclable plastic box has drainage and an 11-quart capacity, making it better suited to narrow arrangements or use as a liner.

At just 5 inches high, the Novelty Poly-Pro Flower Box fits shallow planting spaces and can also serve as a liner inside another planter. Its 35.75-inch length gives flowers a long, narrow growing area, while ridged sides add sturdiness to the lightweight plastic construction.

The 35.75-by-8-by-5-inch shape works where a deeper trough would take up too much room, and its 11-quart soil capacity gives buyers a clear sense of planting volume. Use it on its own or as a protective liner inside a window box or other planter. The ridged, scalloped sides support the plastic body, while the listed drainage hole and water-drainage feature address excess water. Lightweight, fade-resistant, recyclable plastic makes it easy to handle.

Pros

• Long, narrow 35.75-by-8-inch footprint
• 11-quart soil capacity
• Ridged sides add sturdiness
• Drainage hole; lightweight, fade-resistant, recyclable plastic

Cons

• Its 5-inch height limits root depth compared with deeper troughs.

Skip it if you need deep soil for large-rooted plants; the TooCust planter set offers 19.7-inch height and deeper growing space.

Choose this Novelty box for shallow flowers, a narrow display, or a liner inside an existing window box. Its compact 5-inch height and 11-quart capacity suit modest planting needs, not deep-rooted crops.

Full product details

Brand	Novelty
Capacity	11 quarts
Color	Black
Included Components	Instruction manual
Item Dimensions	8 x 35.75 x 5 inches
Dimensions	8"D x 35.75"W x 5"H
Item Weight	1.5 pounds
Manufacturer	Novelty
Part Number	02368
Material	Plastic
Model Number	2368
Special Features	Drainage Hole
Product Style	Flower Box
Size	36-Inch
Special Feature	Drainage Hole
Style	Flower Box

Listed on Amazon as: Root & Vessel Poly-Pro Plastic Flower Box Planter, Black, 36-Inch

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#6

6. Land Guard Galvanized Raised Bed

• Dimensions D x W x H: 72"D x 36"W x 23.8"H
• Capacity: 266 gallons
• Material: Metal

Best for: Large Galvanized Garden Bed.

Why it ranks #6: Its 6-by-3-foot galvanized metal bed holds 266 gallons, but its broad raised-bed format is less like a conventional trough planter.

The Land Guard trough measures 6 by 3 feet and stands 1.99 feet high, giving garden growers a broad, raised space for vegetables, herbs, flowers, or fruit. Its Q195 galvanized metal sheet has double-layer anti-corrosion galvanizing, and an oval structure reinforces the interfaces against pressure and loosening.

With a 72-by-36-inch footprint and 23.8-inch height, this raised bed provides a sizable planting area for a courtyard, yard, garden, or greenhouse. The 266-gallon capacity supports a substantial volume of growing medium. Q195 galvanized metal and double-layer anti-corrosion galvanizing address material protection, while the oval structure is specified to withstand greater pressure at the interface and resist loosening or deformation. Its metal-sheet construction is a practical fit for a permanent outdoor bed rather than a portable window box.

Pros

• 72-by-36-inch raised-bed footprint
• 23.8-inch height and 266-gallon capacity
• Q195 galvanized metal sheet
• Oval structure reinforces interfaces against pressure and loosening

Cons

• At 72 by 36 inches, it needs substantial dedicated ground space.

Skip it if you have only a narrow patio or railing; the Novelty 36-Inch Poly-Pro Flower Box takes a slimmer, shallower form.

Pick this Land Guard bed for a yard or greenhouse with room for a substantial raised planting area and varied crops. Its 6-by-3-foot footprint is the key boundary for smaller patios or compact growing spots.

Full product details

Brand	Land Guard
Capacity	266 gallons
Color	Classic Silver
Included Components	Metal sheet
Item Dimensions	72 x 36 x 23.8 inches
Dimensions	72"D x 36"W x 23.8"H
Item Weight	12.88 kg
Manufacturer	Land Guard
Material	Metal
Special Features	Breathable, Fade Resistant, Rust Resistant
Product Style	Garden
Size	6×3×1.99ft
Special Feature	Breathable, Fade Resistant, Rust Resistant
Style	Garden

Listed on Amazon as: Land Guard Galvanized Planter Raised Beds, 6×3×1.99ft Galvanized Water Trough, Keyhole Raised Garden Bed Metal

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Check the planting footprint, not just the overall length

A long trough can still be too narrow or shallow for the plants you want to grow, so compare all three dimensions with your planting plan. The Novelty Poly-Pro Flower Box measures 35.75 by 8 by 5 inches and holds 11 quarts, a very different scale from the Step2 Tremont, whose individual planters are 39.5 inches wide, 16.75 inches deep, and 14.5 inches high. The Lechuza Trio Stone is about 39 by 14 by 13 inches and divides its growing area among three liners.

Those dimensions may suit grouped arrangements, but they are not one uninterrupted planting space. The Land Guard bed is 72 by 36 by 23.8 inches, so confirm that a garden can accommodate its footprint before treating its much larger capacity as an advantage.

Check usable planting depth and width against the roots and spacing your plants need; the listed exterior dimensions alone do not establish usable soil depth.

Water reservoirs do not replace drainage planning

A built-in reservoir can reduce how often you water, but it does not eliminate the need to understand how excess water leaves the planter. The Step2 Tremont and Wave list internal drainage points and plugs, while the Lechuza Trio Stone uses three separate reservoirs with water-level indicators. TooCust describes an upper drainage-hole plate, a bottom water compartment, and a transparent plug for venting water.

These designs handle water differently, so do not assume that a plug should always be removed or left in place; follow the product’s instructions for the growing location and plants. Poorly managed excess water can leave roots too wet, while relying on a reservoir without checking its level can let plants dry out.

The Novelty box lists a drainage hole, but the supplied details do not describe a reservoir. Match the watering arrangement to your routine and whether the trough will sit where drained water can escape safely.

How to Choose a Garden Plant Trough

Footprint and growing depth

Choose dimensions that fit both your planting area and the roots you intend to grow. The listed options range from the Novelty Poly-Pro Flower Box at 35.75 by 8 by 5 inches to the Land Guard bed at 72 by 36 by 23.8 inches. Step2’s Tremont planters measure 39.5 by 16.75 by 14.5 inches each, while the Lechuza Trio Stone is about 39 by 14 by 13 inches.

A narrow sill or tight ledge favours the Novelty box; a patio arrangement can favour the Step2 planters. For a larger garden footprint, consider the Land Guard, but check the available ground space first.

Treat listed dimensions as exterior measurements, not a guarantee of usable soil depth.

Capacity and planting scale

Use stated capacity to judge how much planting space you are getting, while keeping the number of containers in mind. Each Step2 Tremont planter holds 59 dry quarts, and each Wave holds 57.8 dry quarts; both products are supplied as two planters. The Novelty box holds 11 quarts, whereas the Lechuza Trio Stone lists 1.74 cubic feet and includes three liners.

TooCust lists 395.8 liters for its set, and the Land Guard raised bed lists 266 gallons. These figures use different units and may describe different product configurations, so compare carefully rather than assuming a direct equivalence.

Smaller arrangements favour the Novelty box; multiple patio plantings favour the Step2 two-packs; larger ground-level growing favours the raised bed.

Watering and drainage design

Look for a water system that suits your watering habits and the planter’s location. Step2’s Tremont and Wave include reservoirs, internal drainage points, and plugs; their capacities are 59 and 57.8 dry quarts per planter, respectively. Lechuza provides three independent liners, each with a reservoir and water-level gauge.

TooCust uses a two-layer design with an upper drainage-hole plate, a water compartment, and a transparent plug. The Novelty box lists a drainage hole but no water reservoir in the supplied specifications.

Gardeners who want visible reservoir indicators may prefer the Lechuza; those seeking a large patio pair can consider either Step2 model. If you prefer a simpler box or liner, the Novelty is the more straightforward format, but plan watering accordingly.

Which garden trough should you choose?

For a pair of large, ready-to-use patio planters, choose the Step2 Tremont Trough Planter: each holds 59 dry quarts and combines a reservoir with internal drainage. If you want a similar two-planter format in white, the Step2 Wave Trough Planter holds 57.8 dry quarts per planter. Choose the Lechuza Trio Stone when three separate liners and individual water-level indicators suit your planting arrangement.

For a long, configurable planter set with a two-layer watering design, consider the TooCust Outdoor Planter Box. The Novelty Poly-Pro Flower Box fits narrow arrangements or use as a liner, but its 8-inch width and 5-inch height limit its scale.

Choose the Land Guard Galvanized Raised Bed only if your priority is a broad, high-capacity garden bed rather than a conventional trough.

Frequently Asked Questions

How much depth do different garden plants need in a trough?

Match usable soil depth to the plants’ root systems: shallow-rooted flowers and herbs can grow in less depth than plants with deeper roots. Check the trough’s interior dimensions, not just its outside height, and allow room for drainage or a reservoir where the design includes one.

Should outdoor trough planters have drainage holes open or plugged?

Keep drainage holes open for ordinary planting so excess water can escape and roots are less likely to sit in soggy soil. Some self-watering designs use reservoirs and internal drainage points, so follow the planter’s intended setup rather than blocking openings without instructions.

How should a trough planter be secured on a balcony or railing?

Set it on a stable surface and use a suitable planter bracket or restraint rated for the planter’s filled weight if mounting it to a railing. Check your balcony or building rules, avoid blocking drainage, and do not rely on an unsecured planter where wind or movement could shift it.

What should I consider when choosing a trough for a patio?

Consider the available footprint, planting volume, and how often you can water. The Step2 Tremont offers two 39.5-inch-wide planters, each holding 59 dry quarts, with a reservoir and internal drainage. A narrower flower box may suit compact arrangements, while a raised bed is intended for a broader garden-growing footprint.

When is a self-watering trough a useful choice?

A self-watering trough can help when you want a water reservoir to reduce the need for frequent watering. Compare how its reservoir and drainage work, and consider whether separate liners or water-level indicators would better suit your planting arrangement, as with the Lechuza Trio Stone.

Final Words

For a pair of spacious, ready-to-use patio planters, the Step2 Tremont is the strongest overall fit, combining 59 dry quarts per planter with a reservoir and internal drainage. Choose the Lechuza Trio Stone if three liners and water-level indicators are priorities; pick the Land Guard bed for a broad growing area. For narrow arrangements, the 36-inch flower box is a more compact option.

Check placement, drainage, and available space before deciding.