How to Build DIY Raised Garden Beds (2024)

Are you interested in starting your own garden, but don't have the space or suitable soil? Building raised DIY garden beds might just be the solution you're looking for. Whether you're an experienced gardener or a beginner, creating raised garden beds offers a whole range of benefits and can easily be done with a few simple steps.

Why Build a Raised Garden Bed?

How to Build DIY Raised Garden Beds (1)

A raised garden bed is a large planter box that retains soil above ground level. It's a great choice for maximizing your garden space, because a raised bed can be placed on top of poor soil then filled with whatever soil type you need for the flower or vegetable garden of your dreams.

A raised bed garden can also be built above ground, at a taller height. An elevated garden bed like this can make it easier for anyone who struggles to bend down or sit on the ground to participate in gardening.

Planting in a raised bed filled with compost and topsoil can help to reduce the need for weeding, especially if the bed is lined with landscape fabric.

How to Build a Raised Bed

Before you begin, think about where your raised bed will be located. If you want a vegetable garden bed, you'll need to choose a suitably sunny spot. It's also a good idea to make sure you have easy access to water so you can keep your plants happy.

Experts recommend keeping your raised bed a maximum of four feet in width. Any bigger and it will become difficult to reach the plants in the middle. If you can't access all sides, for example because you want to place your raised bed against a house wall or fence, you'll need to choose a narrower bed design.

Materials

How to Build DIY Raised Garden Beds (2)

Once you've chosen the perfect spot and thought about dimensions, it's time to choose your materials. A popular option is untreated lumber. Untreated wood will remove the possibility of chemicals leaching into your soil, and therefore into whatever you plan to grow.

Other possible materials include cinder blocks or concrete blocks, natural stone or even steel. Some gardeners make use of recycled materials such as cattle troughs, or use large garden planters for raised bed gardening.

If you don't want to go for the DIY option, you can order a garden bed kit, or even a ready-made garden bed planter, for delivery.

Construction

For a very simple raised bed, you'll need four pieces of lumber cut to length according to your chosen dimensions. You'll also need a drill and eight 2-1/2-inch deck screws.

The width of the lumber will be the depth of the raised bed. Six inches is the minimum depth for gardening. This depth is recommended by Gardeners Path as suitable for most vegetables; however, you may want to use wider boards if you'd prefer a deeper bed. Alternatively, you can add another layer of wood to make it deeper.

Once your four boards are cut to length, arrange them in a rectangle shape. If you have shorter walls, place those flush to the longer ones. Drill pilot holes, then use the deck screws to join your boards together.

Lining

It can be helpful to line the base of your raised garden bed with landscape fabric. This can help to prevent weeds growing up from beneath the surface. You could also use a layer of hessian or even a flattened cardboard box; these will eventually decompose and become part of the soil.

Avoid lining with plastic sheeting, as this will not allow for adequate drainage.

Soil

Once your garden bed is constructed, it's time to fill it up with soil! Experts recommend a combination of garden soil and potting compost. You can purchase bags of soil ready-mixed, or create your own combination. Nutrient-rich soil with added organic matter is important if you want to grow a crop of tasty vegetables!

What to Grow in a Raised Garden Bed

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Some gardeners like to grow flowers in their raised garden beds, but many people build them especially to grow their favorite vegetables. Even root vegetables such as carrots can grow in a raised bed. For inspiration, check out our article on the best vegetables to grow in Florida. And, as always, if you would like any help with your landscape design, get in touch with LawnMore's friendly gardening experts!

How to Build DIY Raised Garden Beds (2024)

FAQs

What kind of wood should be used for raised beds? ›

Cedar is often considered the golden standard for building raised beds, and it's my favorite option to use. The downside is that the cost of cedar has, unfortunately, risen a lot over the last few years. Redwood has the same benefits as cedar, but it's also been priced out of many gardeners' budgets.

Is it cheaper to buy or build raised garden beds? ›

On average, a DIY raised bed constructed from wood will cost $25 to $50 per square foot. To have a wooden raised bed constructed and installed for you, budget for at least $100 per square foot. (Find a kitchen garden company in your area.)

What do you put in the bottom of a raised garden bed? ›

Best Soil for Raised Garden Beds

We recommend buying high-quality, nutrient-rich soil in bulk. Or, you can make a soil mix with equal parts topsoil, organic materials (leaves, composted manure, ground bark), and coarse sand.

What is the cheapest way to make a raised garden bed? ›

Raised beds made of cinder blocks or concrete blocks

Cinder blocks and concrete blocks are very inexpensive (typically $2 to $3 a piece at home improvement centers), and they make it really easy to build the outline of a raised garden bed.

Is treated lumber ok for raised garden beds? ›

He stated in a bulletin titled, Treated Wood in Raised Bed Gardening, “Scientific evidence and data have shown that using pressure treated wood for raised bed or box gardening is safe to adults and children in terms of the plants grown and used in these containers.” He further explains, “All chemicals in consumer ...

Do wooden raised beds need to be lined? ›

Liners can help prevent burrowing pests such as voles, moles, gophers, groundhogs and groundhogs. The padding suppresses weeds that may grow from the ground under a raised bed, but this is only necessary if your bed is under 6 inches.

How deep should a raised garden bed be? ›

The minimum required depth depends on the plant. But on average, a raised garden bed should accommodate about 20 inches of soil for the roots of flowers and vegetables.

What are the disadvantages of raised garden beds? ›

Raised beds need water more often since the soil is more exposed to air and dries quicker. Similar to growing in containers, the extra watering can leach nutrients out of the soil quicker than in-ground gardens. For that reason, raised beds will likely need fertilizer more often.

Should I put gravel around my raised garden bed? ›

If you're going to pay for a product to fill your raised beds, again, it should just be really good soil and compost. I only recommend a thin layer of gravel at the bottom of your raised bed and under the edges to help you level the area. Save the rest of your gravel for your garden pathways.

What are three mistakes to avoid when gardening with raised beds? ›

What Are 3 Common Mistakes to Avoid When Gardening with Raised Beds?
  • Overcrowding Plants.
  • Using Poor Quality Soil.
  • Neglecting Watering and Drainage.
  • Conclusion.
Mar 11, 2023

Why put cardboard in raised beds? ›

The answer is yes. You can line the bottom of your raised garden bed with cardboard and newspaper to block out weeds or act as a barrier against rhizomatous, weedy or invasive plants. While some may opt for landscape fabric, cardboard is a more cost-effective option.

Do you put landscape fabric under raised beds? ›

Landscape fabric is beneficial for raised garden beds, here are just a few of the many reasons why you should use landscape fabric for raised bed gardening: Prevents soil erosion in a raised bed: As a liner, landscape fabric lets water drain away from the soil while leaving the soil intact.

What is the cheapest material to build a raised bed? ›

The best types of wood to use for a raised garden bed include wood pallets or cedar wood. What should you put at the bottom of a raised garden bed? Cinder or concrete blocks are an inexpensive and popular material used to build a foundation for a raised garden bed.

Is galvanized steel safe for garden beds? ›

The galvanization process involves coating the steel with zinc, which serves as a protective barrier against corrosion or rusting. This means that there won't be any harmful chemicals leaching into your soil or vegetables, making it a safe and reliable option for your food garden.

What are the best vegetables to grow in raised beds? ›

Most garden vegetables will grow well in raised beds. Try growing lettuce, greens, radishes, and strawberries. Bush type vegetables, such as tomatoes, cucumbers, and beans also do well in raised beds.

What wood should not be used in a raised garden bed? ›

An older type of wood preservative called Chromated Copper Arsenate (CCA) contained arsenic, copper, and chromium. CCA-treated wood is no longer available for residential use as of 2004. Avoid using older types of wood treatments such as CCA, creosote, and Penta-treated lumber.

What is the longest lasting wood for raised garden beds? ›

The type of wood used for raised beds makes a difference. Redwood and cedar are more expensive but resist decay, so they last longer. Pine and fir will break down more quickly but are available at a fraction of the cost.

How thick should the wood be for a raised garden bed? ›

Use lumber that's at least 2″ thick. Many beds are built of 2x6s, because a 6″ deep bed will grow nearly anything except carrots and parsnips. At Spotts, we use 2x8s because we like that extra depth. The easiest way to make a raised bed is just to screw some 2x6s together to make a square.

What is the cheapest wood for raised garden beds? ›

COST OF WOOD: First I visited the home improvement center to price out boards. Common pine boards would be the least expensive option compared to cedar or redwood. After analyzing the cost of the pine boards at different lengths, it was obvious I would save money if I cut larger boards in half.

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