Raised Garden Bed Plans — Dirt Farmer Jay (2024)

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DIY Raised Garden Bed

If you’re thinking about adding a raised bed to your garden, there’s no need to buy one that’s ready-made. Not only is it easy to make your own vinyl raised garden beds, but it’s also a lot cheaper than buying prefabricated units. Supplies are readily available and you only need a few tools. Read on to learn what you need to know to just do it yourself. Plus, we’ve created a free set of raised garden bed plans for you to download. Enjoy!

Make Your Own Raised Garden Bed

Building a raised garden bed is not only cost-effective, but it’s also simple. We prefer to use vinyl fencing that is stocked at most home improvement stores. The color is attractive and plays well with all the colors in the garden, it lasts several years without being expensive, and vinyl can be sawn, drilled, and filed with common tools found in many home shops.

You’ll be using vinyl fence rail and corner post stock, along with the number of post caps you’ll need for your project. We use 5” x 5” (13 cm x 13 cm) post stock. If you can obtain plain stock, without any fence rail socket cutouts, you will have more flexibility on how to use it.

Our garden beds are “double-deckers” - meaning that we use two fence rails stacked on top of each other to form the box sides. This means that the corner posts are cut at 17” (43 cm) tall. You can do singles, but we prefer doubles both to give more depth to the growing medium, more height to the box so we don’t have to bend down as much to tend the gardens, and to provide more height so if we place path materials, there is still enough height to have nice proportions to the boxes.

In the United States, the fence rails are commonly sold in 16’ (about 5 meters) lengths. This works out really well. We make our boxes 4’ (1.22 meters) wide, and then, depending on the setting, look, space available, and type of crop, we can make the beds 4’ (1.22 meters), 8’ (2.5 meters), or 12’ (3.6 meters) long. This is a very efficient use of material.

We DON’T make 16’ (5 meters) long garden beds. Why? We know ourselves (and most of the rest of humanity) - we will be tempted to not walk around a garden bed to access the other side without stepping into the garden - which is a real raised bed garden “no-no”! Compaction is a real risk, as well as trampling plants, encouraging weed growth, or breaking some of the restraints installed in the box below soil level.

By the way, one of the ways to economize is to purchase damaged fence rails. If the damage is moderate, it’s easy to orient the pieces in such a way that the damage is concealed. We’ve been able to purchase damaged pieces for as much as 70% off the usual price. Not bad!

Raised Garden Bed Plans

While nothing fancy, we’ve prepared a set of raised garden bed plans with parts and dimensions for you to cut the pieces you’ll need for common bed configurations. Plus, here are some additional things to keep in mind before you get started building a raised garden bed:

  • For a 4’ x 4’ unit, you’ll need 4 corner posts, 4 caps, and 8 - 4’ pieces of rail.

  • When building a 4’ x 8’ unit, you’ll need 4 corner posts, 2 inline posts, 6 post caps, 4 - 4’ fence rails, and 4 - 8’ rails.

  • If you build a 4’ x 12’ unit, you’ll need 4 corner posts, 4 inline posts, 8 post caps, 4 - 12’ sections of fence rail, and 4 - 4’ sections of fence rail.

Bottom Line

Instead of buying a pre-made garden box, it’s easy to build a DIY raised garden bed yourself. You don’t need to have a full workshop, as only a few tools are required. Plus, supplies are readily available at most local hardware stores. So, as Jay always says, why not JUST DO IT YOURSELF?! There are lots of great raised garden bed ideas you could try!

You’re welcome to leave us a comment if you used our plans to make your own raised garden bed. We love engaging in conversations with our readers and viewers! Also, feel free to check out our video if you want to see how Dirt Farmer Jay went about making his own vinyl raised garden beds. Have fun!

Raised Garden Bed Plans — Dirt Farmer Jay (2024)

FAQs

What is the best soil mixture for raised beds? ›

Add a mixture of compost and purchased topsoil in a 1:2 or 1:1 ratio, to the top of the bed. There are vendors who sell topsoil mixed with compost. Alternatively, fill the bed with compost and a soilless growing mix in a 1:1 ratio.

How to calculate amount of soil needed for raised garden bed? ›

To calculate:
  1. Measure the length, width and height of your bed. (Unless the boards are very thick, don't worry about inside/outside measurements.) ...
  2. Multiply all the measurements together: 6 x 3 x 1.4 = 25.2 cubic feet.
  3. Divide the answer by 27 to get the number of cubic yards.

What is the cheapest way to make raised garden beds? ›

Here are a few items you could use, round up or find in your yard to create a raised bed on a small budget.
  1. Bricks.
  2. Stones.
  3. Wood or barn wood (make sure it's chemical free)
  4. Fence pickets.
  5. Cinder blocks.
  6. Galvanized tubs.
May 3, 2023

How deep does the dirt need to be in a raised garden? ›

A depth of 8 – 12 inches will suffice for most gardening situations. Because of the excellent drainage properties of raised beds, it is possible to grow an abundance of vegetables in a limited amount of space.

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

As a rule of thumb, a 4'x8' raised bed that is 6 inches deep requires approximately 8 bags of soil while a 4'x8' raised bed that is 12 inches deep requires approximately 16 bags of soil.

How much dirt do I need for a 4x8 raised bed? ›

How much soil? For a 4x8–foot raised bed with a 10” height, about 1 cubic yard of soil is needed.

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)

What percentage of soil is needed for raised beds? ›

The Right Blend of soil for a raised bed

60 percent quality soil. 30 percent composted material. 10 percent soil-less add-ins such as perlite.

How many tomato plants in a 3x6 raised bed? ›

A good rule of thumb is to plant 6-8 indeterminate tomato plants in a 3x6 raised bed, giving each plant at least 1.5 to 2 square feet of space. This spacing accommodates their need for support structures like cages or trellises and promotes healthy growth and fruiting.

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 is the cheapest material to make a raised bed? ›

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.

What grows best in a raised garden bed? ›

Some annuals you might want to grow in your raised bed garden are petunias, pansies, basil, lemongrass, and vegetables like tomatoes, potatoes, peppers, squash, and onions. Bonus tip: To help reduce the chance of disease and pests, you don't want to grow annual vegetables in the same spot year after year.

How deep to plant tomatoes in raised bed? ›

Ideal raised bed depth based on the plants you want to grow
  1. herbs - 6 inches deep.
  2. lettuce - 6 inches deep.
  3. carrots - 12 inches deep.
  4. radishes - 12 inches deep.
  5. peppers - 12 inches deep.
  6. tomatoes - 18 inches deep.
  7. cucumbers - 18 inches deep.
  8. squash/zucchini - 18 inches deep.
Oct 3, 2023

How deep should a raised garden bed be for tomatoes? ›

Tomatoes should ideally be grown in a raised bed that's at least 15 to 18 inches deep. Many of my clients in Houston are successfully growing tomatoes in 12-inch deep raised garden beds, but their plants tend to be a little stunted compared to plants in deeper beds.

Do you put topsoil in raised beds? ›

Filling Raised Beds

We fill our beds with half compost and half topsoil. It's economical, the soil gives the plants' roots something to hold onto, and the compost feeds the plants.

Is potting mix or garden soil better for raised beds? ›

You want to use far more garden soil than potting mix, around a 5:1 ratio. You can also make your own raised bed mix by mixing all the individual parts of garden soil and potting soil, so topsoil, bark or peat, compost, and perlite or vermiculite.

What is the best topsoil for a vegetable garden? ›

The ideal soil composition for gardens is loam consisting of 40 percent silt, 40 percent sand and 20 percent clay. Garden soil has acidity and alkalinity balanced for specific plant growth along with minerals and nutrients readily available to feed plants.

Is topsoil good for raised vegetable beds? ›

Topsoil can be used to cover the ground, to create new beds, borders or to provide a base for turf laying or sowing grass seed. In paved gardens where there is no access to soil, topsoil can be used in raised beds for growing many plants, including vegetables.

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