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 is the cheapest method for raised beds? ›

Pallet garden beds are a very simple and inexpensive way to create a raised garden. All you need is a pallet, some wood boards, and screws to assemble the pallet garden bed. Making a raised garden bed from pallets is very easy and can be done in just hours.

How do I work out how much soil to fill a raised bed? ›

For example, if your bed is 6 feet long, 3 feet wide and 16.5 inches high, convert the inches to feet so your new measurements are 6 x 3 x 1.4 feet. Multiply all the measurements together: 6 x 3 x 1.4 = 25.2 cubic feet. Divide the answer by 27 to get the number of cubic yards.

How do you prepare soil for raised garden beds? ›

Remove all rocks, old roots, and plant debris. Dig down a little further with the shovel (a few more inches) to just loosen up the soil. Mix the soil with organic matter such as compost. We recommend that the compost make up about 25% of your soil.

Is it cheaper to make or buy 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 to put on the bottom of a raised garden bed? ›

Cardboard or newspaper: Cardboard is a great option if you are on a budget. You can line the bottom of your raised garden bed with cardboard and newspaper to deter pests and weeds.

How many bags of soil do I need for a 4x8 raised bed? ›

For a 4x8-foot raised bed with a 6” height, using Mel's Mix: about 5 cubic feet each of compost, peat moss, and vermiculite is needed. It usually takes about two to three bags of purchased fertile mix (1.5 cubic feet each) to cover the bed surface to a depth of 2 inches.

How deep should a raised garden bed be? ›

Vegetable Beds: On the other hand, when it comes to vegetable beds, the bed must be approximately 12 to 18 inches deep to ensure adequate depth for the roots of your plants. This is especially important if your raised bed is placed on cement or the patio, which will inhibit roots from growing deeper into the ground.

Should I put rocks in the bottom of my raised garden bed? ›

The answer is no! Here are some reasons why we recommend against adding rocks to the bottom of your raised beds: Hindered root growth. Rocks in the bottom of a raised garden bed can impede the growth of plant roots, particularly if they are large or densely packed.

How many bags of soil do I need to fill a 3x6 raised bed? ›

To fill a 3x6 bed with 10" sides, you will need 15 cubic feet of blended soil. To create the blend, use the following quantities: 9 cubic feet of topsoil (9 20-quart bags) 4.5 cubic feet of compost (4.5 20-quart bags)

How many yards of soil do I need for a 4x8 raised bed? ›

Each 4'x8' bed will require 1 cubic yards of soil.

How many bags of soil do I need for a 2x4 raised bed? ›

Therefore, you'll need six bags of garden soil for a 2x4 raised bed that is 6 inches deep. However, if you plan to make your raised bed deeper, you'll need more soil to fill it. For example, if you want to make your raised bed 12 inches deep, you'll need approximately 1.5 cubic feet of soil per square foot.

What vegetables should not be planted together? ›

14 Vegetables You Should Never Plant Together—Gardening Experts Explain Why
  • 01 of 14. Beans and Onions. ...
  • 02 of 14. Tomatoes and Potatoes. ...
  • 03 of 14. Corn and Tomatoes. ...
  • 04 of 14. Tomatoes and Brassicas. ...
  • 05 of 14. Cucumber and Squash. ...
  • 06 of 14. Lettuce and Celery. ...
  • 07 of 14. Fennel and Tomatoes. ...
  • 08 of 14. Peppers and Cabbage.
Jan 16, 2024

Can you use regular potting soil in a raised bed? ›

While potting mix alone is too light for use in raised beds, creating a 50:50 blend of potting mix and Miracle-Gro® All Purpose Garden Soil will give just the right balance. Top-notch potting mix and raised bed soil may cost more than low-quality versions, but you really get what you pay for.

Can you fill a raised bed with just soil? ›

Can you fill a raised bed with just top soil? Topsoil is good for filling raised beds, but always use it as part of a mix with compost or other organic matter. Topsoil on its own will not drain well in raised beds and it may not contain the same levels of beneficial microorganisms as you would get in compost.

What is the cheapest material for raised garden beds? ›

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.

How to make a raised bed garden cheaply? ›

But fear not, there are ways to build an elevated gardening bed on a budget. One option is to use recycled materials such as old pallets, cinder blocks, or even tires. These items can often be found for free or at a very low cost.

How much does it cost to build a 4x8 raised bed? ›

Raised-Bed Garden Cost per Square Foot

If you're DIY'ing your garden installation, expect to spend anywhere from $25 to $50 per square foot of garden space for wood raised beds. Stone, brick, and steel will be more expensive.

References

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