Low Profile Rectangular Planter Box – Minimalist Fiberglass Form for Modern Patios and Walkways

• Pots, Planters & More stands by the quality of our fiberglass manufactured planters.
• Planters are covered by a three (3) year warranty from the date of acceptance. As the original purchaser of our products, we warrant that they are free from manufacturing defects and made from quality materials.
• Any item proving to be defective in material or workmanship will be repaired, exchanged, or credited at the discretion of Pots, Planters & More.
• Any misuse, abuse, unauthorized modifications, neglect, accidents, or any other hazard to the product will void the warranty.
• Detailed instructions are provided with each planter to ensure its longevity. Pots, Planters & More strongly recommends following these instructions when using your planters.
• It is the purchaser's responsibility to ensure that containers for outdoor use have sufficient drainage. It is particularly important in regions that are subject to freezing temperatures.
• Labor, shipping, delivery, installation, or any other costs associated with a claim will not be covered by Pots, Planters & More.

• We ship to the continental United States of America. Orders to other locations cannot be placed on this website and you will need to contact us at sales@potsplantersandmore.com.
• All our shipments are sent via common carrier (LTL). Each shipment will either be delivered to a dock (if available) or curbside via liftgate. Recipient is responsible for moving the planters from the curb or dock to their final point of installation.
• Shipping & Handling is included in the price for retail sales, and will be quoted & billed at actual freight rates for wholesale sales.

Need a planter that frames your space without stealing the spotlight? Our 12-inch-tall Low Planter Box Collection does just that - stylish, rectangular silhouettes that define walkways, patios, storefronts, and terraces with no added bulk.

Each planter is 12" tall, 14" wide, and offered in lengths from a compact 14" cube to a generous 72". Built from durable fiberglass, they’re lightweight yet weather-tough, finished in your choice of matte or gloss with over 45 colors to pick from. Optional drainage holes are available, and every piece comes with a 3-year warranty. 

From lining glass walls to edging balconies or softening patio foundations, this narrow long planter box collection brings an elegant touch to any setting.

Why You’ll Love This Collection

• Just 12" tall and 14" wide 
• Multiple lengths: 14" cube, 36", 48", 60", 72"
• Lightweight yet weather-tough fiberglass build
• 45+ matte and gloss finishes available
• Optional drainage holes (recommended outdoors)
• UV- and frost-resistant for year-round durability
• Backed by a 3-year warranty
• Made-to-order, ships in about 3 weeks

Choose the Right Size and Layout

Low rectangular planters work best when they fit naturally into the flow of your space. Here’s how each size comes to life:

• 14" x 14" x 12" (cube) - Perfect as a small accent by steps, at entries, or to cap off the end of a longer row.
• 36" x 14" x 12" - A tidy span under windows or flanking a doorway.
• 48" x 14" x 12" -  The go-to choice for balcony rails, between posts, or along a bench back.
• 60"–72" x 14" x 12" - This long low planter is ideal for edging patios, pool decks, storefronts, or rooftops where long, low definition is needed.

Tip:  For a streamlined look, line up two or three of the same length in a row. To stagger around corners or add rhythm, mix 36" and 48" sizes. And if you’re working along a walkway, leave 18–24 inches of clearance so foot traffic feels comfortable.

Planting Ideas That Work Best

At just 12 inches tall, these planters are best suited for shallow-rooted, compact plants. The effect is modern, graphic, and endlessly adaptable.

For full sun 

Choose plants that love the heat and reward you with color and structure. These picks thrive outdoors and keep their shape all season long.

• Low ornamental grasses like blue fescue or dwarf fountain grass
• Compact lavender, rosemary, and thyme for color and fragrance
• Trailing sedum, million bells, or portulaca for soft edges
• A clipped row of dwarf boxwood or dwarf yaupon for a clean, hedge-like look

For partial shade or bright indoor light

Not every space basks in full sun. These greenery options stay vibrant in filtered light or bright indoor conditions.

• Trailing pothos or philodendron mixes
• ZZ plant ‘Raven’ paired with silver satin pothos
• Low sansevieria, peperomia, or trailing ivy geraniums in bright windows

For a modern desert vibe

Prefer something sculptural? Succulents and cacti bring a contemporary vibe, perfect for dry, sunny spots or minimalist interiors.

• Mixed echeveria and aeonium rosettes with string-of-pearls spilling over the edge
• Evenly spaced golden barrel pups for a bold, graphic row

For soft, textural borders

Sometimes you just want a gentle, flowing edge. These plants add movement and texture, softening the crisp lines of the rectangular planter.

• Liriope or mondo grass planted as a ribbon
• Trailing dichondra ‘Silver Falls’ cascading over the front lip

Tip: Space plants about 8–12 inches apart for a continuous look. Use a lightweight, well-draining potting mix, and add drainage holes outdoors. For indoor use, line the planter and place felt pads beneath to protect floors.

Pick the Right Color and Finish 

Color and finish set the mood. Whether you want your narrow planter box to disappear into the background or pop as a statement piece, these pairings make it simple:

Matte black - Crisp contrast against white siding or light stone. Pairs well with black-framed windows and concrete pavers.

Matte or gloss white - Brightens shaded patios and looks striking against brick or dark decking - a go-to for coastal spaces.

Charcoal or gray - Blends with concrete for a smooth architectural look, letting greenery take center stage.

Warm neutrals (bronze, tan) - Perfect with teak or ipe decking, stucco, and warm-toned architecture.

Bold hues (navy, red, yellow) - Great for branding or wayfinding in cafés, hotels, or retail spaces. Pair with simple green or white plants to keep it balanced.

Tip: Not sure which shade will look best? Order free color swatches before you decide and see how each finish looks in your space.

Steal Our Placement and Styling Tricks

The beauty of a long narrow planter box is how easily it fits into architectural lines without blocking views. Check out these top styling shortcuts:

Match planter length to windows or railings - Pick a size that mirrors the bay width for a built-in look.

Create a green backrest - Place a narrow planter behind a bench for life and softness without blocking views.

Frame patios with symmetry - Use two 72" planters and a 48" in the center to outline dining or lounge areas.

Define balcony edges with flow - Line the sides with long planters but keep corners open for easy movement.

How to Care For Your Planter 

Keeping your low profile planter looking its best is effortless, whether it’s inside or out. Just follow these simple steps:

Outdoors - Always choose drainage so water flows freely. Elevate your narrow outdoor planter box slightly, and add some weight if it’s in a windy spot.

Indoors - Skip drainage holes and line your narrow indoor planter box with a waterproof tray. Felt pads underneath protect your floors from moisture.

Seasonal care - Top off soil, refresh plants, prune when needed, and add a slow-release fertilizer in spring to keep everything healthy.

Finish care - A quick wipe with a damp cloth is all it takes to maintain its polished, like-new appearance.

Ready to Elevate Your Design?

Our narrow rectangle planter box collection proves that a wide low planter can define a space without overwhelming it. Line patios, highlight balcony edges, or add a finishing touch to storefront with the clean design that works anywhere.

Built from durable fiberglass with UV- and frost-resistant finishes, these planters are made to last and come with a 3-year warranty for peace of mind. Choose from over 45 colors in matte or gloss finishes to create the exact look you want.

Need more ideas? Browse our full range of premium fiberglass planters to discover options that fit every corner of your space.