Cedar Planter Boxes: The Ultimate Guide for Beautiful Garden Spaces

Cedar planter boxes bring natural warmth and durability to any garden space. Whether you’re looking to create a raised vegetable garden, add decorative elements to your patio, or maximize growing space in a small area, cedar planters offer the perfect blend of functionality and aesthetic appeal. Their natural resistance to rot, insects, and weather makes them a superior choice for outdoor use, while their warm, rustic appearance complements virtually any garden style. In this comprehensive guide, we’ll explore everything you need to know about cedar planter boxes – from their many benefits to creative design ideas that will transform your outdoor space.

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Why Choose Cedar for Your Planter Boxes

Cedar stands out as one of the most popular choices for outdoor planter boxes, and for good reason. This remarkable wood offers a combination of practical benefits and aesthetic appeal that few other materials can match.

Natural Durability and Longevity

Cedar contains natural oils that act as preservatives, making it naturally resistant to rot, decay, and insect damage. Unlike many other woods that deteriorate quickly when exposed to moisture and weather, cedar planters can last for many years without treatment. The wood contains thujaplicins, which are natural fungicides that prevent decay.

For those looking to further extend the life of their cedar planters, consider applying a natural cedar wood sealer designed specifically for outdoor use. These sealers enhance the wood’s natural protective properties while preserving its beautiful appearance.

Close-up of cedar wood grain showing natural oils and texture

Chemical-Free and Safe for Edibles

Unlike pressure-treated lumber that contains chemicals, cedar is naturally resistant to decay without any added treatments. This makes it an ideal choice for growing vegetables, herbs, and other edibles. You can feel confident that no harmful chemicals will leach into your soil and affect your plants.

Cedar’s natural properties eliminate the need for chemical preservatives, making it an environmentally friendly choice for your garden. The wood is sustainable, renewable, and biodegradable at the end of its life cycle.

Organic vegetables growing in a cedar planter box

Aesthetic Appeal

Cedar’s rich, warm color and distinctive grain pattern add natural beauty to any garden space. New cedar has a golden-reddish hue that gradually weathers to an attractive silver-gray patina over time if left untreated. This natural aging process adds character and charm to your garden landscape.

The wood’s natural appearance complements virtually any garden style, from rustic country gardens to modern minimalist designs. If you prefer to maintain the original color, you can find cedar wood oil finishes that preserve the wood’s natural hue while protecting it from the elements.

Cedar planter box with weathered silver-gray patina

Insulating Properties

Cedar provides excellent insulation for plant roots, helping to maintain more consistent soil temperatures. This natural insulation protects roots from temperature extremes in both hot summers and cold winters, creating a more stable growing environment for your plants.

The wood’s cellular structure creates tiny air pockets that act as natural insulation. This helps prevent soil from freezing quickly in winter and overheating in summer, extending your growing season and protecting delicate plant roots from stress.

Cross-section of a cedar planter showing insulating properties protecting plant roots

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Popular Types of Cedar Planter Boxes

Cedar planter boxes come in a variety of styles and designs to suit different gardening needs and aesthetic preferences. Here are some of the most popular types you might consider for your garden or patio.

Raised Garden Beds

Cedar raised garden bed with vegetables growing

Raised cedar garden beds are perfect for growing vegetables, herbs, and flowers. They typically range from 6 to 24 inches in height and can be built in various sizes to fit your space. The elevated design improves drainage, prevents soil compaction, and makes gardening more accessible by reducing the need to bend over.

Consider cedar raised bed kits if you want a quick and easy solution that requires minimal assembly.

Elevated Planter Boxes

Elevated cedar planter box on legs with herbs growing

Elevated cedar planters stand on legs, bringing the growing area to waist height. These are ideal for patios, decks, and gardeners with mobility issues. The ergonomic height eliminates the need to kneel or bend, making gardening more comfortable and accessible for everyone.

Look for elevated cedar planters with features like built-in drainage systems and sturdy construction for long-lasting use.

Window Boxes

Cedar window box with colorful flowers under a window

Cedar window boxes add charm and color to home exteriors. Mounted beneath windows, they create a beautiful display of flowers or herbs that can be enjoyed from both inside and outside your home. The natural cedar complements virtually any architectural style.

Browse cedar window box options in various sizes to find the perfect fit for your windows.

Tiered Planters

Three-tiered cedar planter with different plants on each level

Tiered cedar planters feature multiple growing levels, maximizing your growing space while creating visual interest. These space-efficient designs are perfect for small gardens, patios, or balconies where you want to grow a variety of plants without taking up too much floor space.

Explore tiered cedar planters to add dimension and growing capacity to your garden.

Planter Boxes with Trellises

Cedar planter box with attached trellis supporting climbing plants

Cedar planter boxes with attached trellises provide support for climbing plants like peas, beans, cucumbers, or flowering vines. These versatile planters allow you to grow vertically, saving space while creating beautiful living screens or garden focal points.

Find cedar planters with trellises to support your climbing plants and add vertical interest to your garden.

Decorative Planters

Ornate cedar planter box with decorative details and flowering plants

Decorative cedar planters feature ornamental details like beveled edges, lattice panels, or decorative trim. These planters serve as garden focal points, enhancing your outdoor décor while providing a beautiful home for your plants. They’re perfect for entryways, patios, or anywhere you want to make a design statement.

Discover decorative cedar planters to add style and character to your outdoor spaces.

DIY Cedar Planter Box: Step-by-Step Guide

Building your own cedar planter box is a rewarding project that allows you to customize the size, shape, and features to perfectly suit your space and needs. Here’s a straightforward guide to creating a basic cedar planter box.

Materials and tools laid out for building a cedar planter box

Materials You’ll Need

Cedar boards (1×6 or 1×8 inches) – check options here

Cedar 2×2 posts for corners

Galvanized or stainless steel screws (won’t rust or react with cedar) – browse screws

Drill and drill bits

Measuring tape and pencil

Saw (circular, miter, or hand saw)

Sandpaper (medium and fine grit)

Level

Optional: Cedar-safe wood sealer – see options

Landscape fabric for lining – find fabric here

Safety equipment (gloves, eye protection)

Step-by-Step Instructions

Plan Your Dimensions

Decide on the size of your planter box. A good starting point for a basic planter is 2 feet long, 1 foot wide, and 1 foot deep. Adjust measurements based on your space and plants’ needs. Remember that deeper planters (at least 10-12 inches) are better for most plants.

Sketch of planter box dimensions on graph paper

Cut Your Cedar Boards

Cut the cedar boards to your desired dimensions. For our example (2’×1’×1′), you’ll need:

Two 24-inch boards for the length
Two 12-inch boards for the width
Four 12-inch 2×2 posts for the corners
Several boards cut to create the bottom (with small gaps between them for drainage)

Cutting cedar boards with a saw for planter construction

Sand the Boards

Sand all cut edges and surfaces to prevent splinters and create a smooth finish. Start with medium-grit sandpaper and finish with fine-grit for the best results. This step is important for both appearance and safety.

Sanding cedar boards for a smooth finish

Assemble the Frame

Attach the side boards to the corner posts using stainless steel screws. Pre-drill holes to prevent the cedar from splitting. Position the corner posts on the inside corners of the planter, creating a sturdy frame.

Assembling the cedar planter frame with corner posts

Add the Bottom

Attach the bottom boards to the frame, leaving small gaps (about 1/4 inch) between boards for drainage. The bottom boards should be placed inside the frame, resting on supporting cleats if needed for larger planters.

Adding bottom boards to the cedar planter with drainage gaps

Apply Sealer (Optional)

While cedar is naturally resistant to decay, applying a cedar-safe sealer can extend its life and preserve its color. Choose a non-toxic sealer if you plan to grow edibles. Allow the sealer to dry completely according to the manufacturer’s instructions.

Applying wood sealer to a cedar planter box

Add Drainage Holes (If Needed)

If you’ve built a solid bottom rather than spaced boards, drill several 1/2-inch drainage holes in the bottom to ensure proper water drainage.

Drilling drainage holes in the bottom of a cedar planter

Line the Planter (Optional)

Line the inside of your planter with landscape fabric to prevent soil from washing out through the drainage gaps while still allowing water to drain. Cut the fabric to size and staple it to the inside walls of the planter.

Lining a cedar planter with landscape fabric

Fill and Plant

Fill your planter with high-quality potting soil mixed with compost for nutrients. Plant your chosen plants, water thoroughly, and enjoy your new cedar planter box!

Filling a completed cedar planter with soil and plants

Get Everything You Need for Your DIY Planter

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Creative Design Ideas for Cedar Planter Boxes

Cedar planter boxes offer endless possibilities for creative garden design. Here are some inspiring ideas to help you incorporate these versatile containers into your outdoor spaces.

Modern minimalist patio with geometric cedar planters

Rustic farmhouse garden with weathered cedar planters

Urban balcony garden with space-saving cedar planters

Japanese-inspired garden with cedar planters and bonsai

Cottage garden with tiered cedar planters full of flowers

Mediterranean-style patio with large cedar olive tree planters

Themed Garden Ideas

Herb Garden

Create a dedicated herb garden in a cedar planter near your kitchen door for easy access while cooking. Divide a larger planter into sections for different herbs, or use multiple small planters grouped together. Popular culinary herbs like basil, rosemary, thyme, and mint thrive in cedar planters.

Consider specialized herb planters designed with dividers to keep aggressive herbs like mint contained.

Pollinator Garden

Cedar planter filled with pollinator-friendly flowers and visiting butterflies

Support local pollinators by filling cedar planters with nectar-rich flowers like coneflowers, salvias, and zinnias. Position your pollinator planters in a sunny location where you can enjoy watching butterflies, bees, and hummingbirds visit throughout the growing season.

Find pollinator-friendly flower seeds to create a buzzing oasis in your cedar planters.

Salad Garden

Cedar planter with various lettuce varieties and salad greens

Grow your own fresh salad ingredients in a cedar planter for convenient harvesting. Plant a variety of lettuces, spinach, arugula, and other greens for continuous harvesting. Add radishes, cherry tomatoes, and cucumbers for a complete salad garden.

Explore salad garden seed collections specifically curated for container growing.

Creative Arrangements

Vertical Garden Wall

Create a living wall by mounting multiple cedar planters on a fence or wall. This space-saving solution adds visual interest while maximizing your growing area. Arrange planters in a grid pattern or stagger them for a more dynamic display. Plant trailing flowers, herbs, or strawberries that will cascade down.

Tiered Plant Stand

Arrange cedar planters of graduating sizes to create a tiered display. Place larger planters at the bottom and smaller ones toward the top. This creates a beautiful focal point for patios or entryways while allowing you to showcase a variety of plants in a relatively small footprint.

Tiered arrangement of cedar planters creating a plant stand effect

Mixed Material Combinations

Combine cedar planters with other materials like metal, stone, or concrete for an eclectic, designer look. The warm tones of cedar pair beautifully with industrial metals, creating an interesting contrast. Try placing a row of cedar planters alongside metal ones, or incorporate stone elements into your cedar planter arrangements.

Mixed material garden display with cedar and metal planters

Mobile Garden

Add wheels to the bottom of your cedar planters to create a mobile garden that can be easily repositioned as needed. This is perfect for following the sun throughout the seasons or rearranging your outdoor space for entertaining. Make sure to use quality casters that can support the weight of soil and plants.

Cedar planter boxes on wheels arranged on a patio

What to Plant in Cedar Planter Boxes

Cedar planter boxes are versatile containers that can accommodate a wide variety of plants. Here’s a guide to help you choose the best plants for your cedar planters based on location, planter size, and your gardening goals.

Best Plants for Different Planter Sizes

Planter Size	Depth Needed	Suitable Plants	Notes
Small (Under 12″ wide)	6-8 inches	Herbs, lettuce, radishes, annual flowers	Perfect for windowsills and small spaces
Medium (12-24″ wide)	10-12 inches	Bush beans, peppers, strawberries, dwarf varieties	Versatile size for patios and balconies
Large (Over 24″ wide)	12-18 inches	Tomatoes, cucumbers, zucchini, ornamental grasses	Provides ample room for root development
Deep (18″+ depth)	18+ inches	Root vegetables, small shrubs, dwarf trees	Ideal for plants with deep root systems

Popular Plant Combinations

Culinary Herb Garden

Cedar planter with culinary herbs like basil, thyme, and rosemary

Basil – needs full sun and regular harvesting

Thyme – drought-tolerant and spreads nicely

Rosemary – provides height and structure

Parsley – tolerates partial shade

Chives – adds vertical interest and edible flowers

This combination provides a variety of flavors for cooking while creating an attractive display of different textures and heights. Position your herb planter in a sunny spot near your kitchen for easy access while cooking.

Butterfly Garden

Cedar planter with butterfly-attracting flowers and a butterfly visiting

Butterfly weed (Asclepias) – monarch butterfly host plant

Purple coneflower (Echinacea) – long-blooming nectar source

Zinnias – colorful and butterfly-friendly

Lantana – heat-tolerant with multi-colored blooms

Verbena – low-growing with prolific flowers

This colorful combination attracts butterflies throughout the growing season while providing a beautiful display of flowers. Place your butterfly garden planter in a sunny, sheltered location where you can observe the visitors it attracts.

Salsa Garden

Cedar planter with tomatoes, peppers, cilantro, and onions for salsa

Tomatoes (determinate variety) – main salsa ingredient

Jalapeño or serrano peppers – adds heat

Cilantro – essential salsa herb

Green onions – easier in containers than full-size onions

Garlic – plant in fall for summer harvest

Grow all the ingredients for fresh homemade salsa in one convenient planter. This combination requires at least a medium to large planter with good depth for the tomatoes. Position in full sun and provide support for the tomato plants.

Seasonal Planting Ideas

Spring

Take advantage of cedar’s insulating properties in spring by planting cool-season crops and early bloomers:

Pansies and violas for early color

Lettuce, spinach, and other salad greens

Radishes and green onions

Spring-flowering bulbs like tulips and daffodils (plant in fall)

Snap peas on a small trellis

Cedar planter with spring flowers and cool-season vegetables

Summer

Fill your cedar planters with heat-loving plants during the summer months:

Tomatoes, peppers, and eggplants

Zinnias, marigolds, and sunflowers

Basil and other summer herbs

Trailing petunias and calibrachoa

Ornamental grasses for texture and movement

Cedar planter with summer vegetables and flowers in full bloom

Fall

Extend your growing season with these fall-appropriate plants:

Ornamental kale and cabbage

Chrysanthemums for fall color

Chard, kale, and other cool-season greens

Pansies (they often survive winter in milder climates)

Ornamental peppers with colorful fruits

Cedar planter with fall plants like ornamental kale and mums

Winter

Even in winter, cedar planters can add interest to your garden:

Evergreen dwarf conifers

Winter-blooming heather

Colorful twig dogwoods

Winter pansies (in mild climates)

Decorative branches and winter berries

Cedar planter with winter interest plants and evergreens

Ready to Start Planting?

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Care and Maintenance of Cedar Planter Boxes

With proper care, your cedar planter boxes can last for many years while maintaining their beauty and functionality. Here’s how to keep your cedar planters in top condition through the seasons.

Seasonal Maintenance

Spring: Inspect planters for winter damage, tighten any loose screws, and apply a fresh coat of sealer if needed before planting.

Summer: Monitor soil moisture carefully, as cedar planters may dry out quickly in hot weather. Consider adding mulch to retain moisture.

Fall: Clean out annual plants and prepare planters for winter by removing debris that could hold moisture against the wood.

Winter: In harsh climates, consider moving smaller planters to a protected area or elevating them off the ground to prevent ice damage.

Person performing maintenance on a cedar planter box

Extending Planter Life

Drainage: Ensure proper drainage to prevent water from pooling in the planter, which can accelerate rot.

Elevation: Use pot feet or small blocks to raise planters slightly off the ground or deck surface to improve air circulation.

Liners: Consider using plastic liners inside large planters to create a barrier between the soil and wood, extending the planter’s life.

Sealing: Apply a cedar-safe wood sealer every 1-2 years to maintain the wood’s natural color and enhance its resistance to moisture.

Cedar planter box with proper drainage and elevation features

Cleaning and Refinishing

Regular Cleaning

Gently brush away dirt and debris from the exterior of your cedar planters using a soft brush. For more thorough cleaning, use a mild solution of water and gentle soap. Avoid pressure washing, which can damage the wood fibers.

Addressing Mildew

If you notice mildew on your cedar planters, clean it with a solution of 1 part white vinegar to 4 parts water. Apply with a soft cloth, let sit for 20 minutes, then rinse thoroughly. Allow the planter to dry completely in the sun.

Sanding

If the surface of your cedar planter becomes rough or starts to splinter, lightly sand it with fine-grit sandpaper. Sand in the direction of the wood grain for the best results. Wipe away all dust before applying any finish.

Applying Sealer

Choose a non-toxic, cedar-safe wood sealer or oil. Apply according to the manufacturer’s instructions, typically with a brush or cloth. Allow to dry completely before replanting. Look for food-safe wood sealers if growing edibles.

Before and after of a refinished cedar planter box showing the restoration process

Troubleshooting Common Issues

Splitting or Cracking

Cedar may develop small cracks or splits over time due to natural expansion and contraction with weather changes. For minor cracks, no action is needed as they won’t affect the planter’s structural integrity. For larger splits, apply wood glue and clamp until dry.

Close-up of a repaired crack in a cedar planter box

Fading Color

Cedar naturally weathers to a silver-gray patina over time. If you prefer to maintain the original warm color, apply a UV-protective cedar oil or sealer annually. To restore color to weathered cedar, lightly sand the surface and apply a cedar-specific finish.

Comparison of new cedar color versus weathered silver-gray patina

Loose Joints

Check for and tighten any loose screws at least once a year, typically in spring before planting. If screw holes have enlarged, fill them with wood filler or toothpicks and wood glue before reinserting screws. For structural issues, reinforce corners with metal brackets if needed.

Soil Contamination

If you’re concerned about soil coming into direct contact with the wood, use a food-safe plastic liner or landscape fabric inside your planter. This creates a barrier while still allowing proper drainage. Replace soil every few years to maintain plant health and prevent disease buildup.

Installing a liner in a cedar planter box

Embracing the Beauty and Functionality of Cedar Planter Boxes

Cedar planter boxes offer a perfect blend of natural beauty, durability, and versatility for any garden space. From their natural resistance to rot and insects to their warm, inviting appearance, cedar planters provide an ideal home for your plants while enhancing your outdoor décor. Whether you choose to purchase ready-made planters or build your own, these versatile containers will serve you well for many growing seasons.

As you plan your garden this season, consider how cedar planter boxes might elevate your space – whether it’s a spacious backyard, a cozy patio, or a small balcony. Their adaptability to various plants and design styles makes them a timeless addition to any garden. With proper care and maintenance, your cedar planters will continue to bring joy and beauty to your outdoor living spaces for years to come.

Beautiful garden scene with various cedar planter boxes integrated into the landscape

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