Learn How to Build a Cinder Block Garden (2024)

When it comes to gardening ideas, many people have lots, but when it comes down to material costs and budgets, then they quickly find their dreams are shattered.

Luckily, there is a solution to this, and it is in the form of the humble cinder block. These are rapidly accessible and cheap. This makes them very versatile to use around the garden in several ways.

Here we will take a quick look at these and a few options, or you can have your own great idea for your garden.

Learn How to Build a Cinder Block Garden (1)What is a Cinder Block?

You have cinder blocks or concrete cylinder blocks. These can look the same, but cinder blocks are much lighter and used in areas where there is no structural capacity required.

The key difference being the concrete variants use sand and gravel to deliver strength, and the cinder block variety uses fly ash or bottom ash mixed into the concrete.

These blocks are recognizable as they come with two holes all the way through. You can also find these made which contain recycled materials, this can give a unique finish, so your cinder block landscaping can take on a very unique look.

Cinder Block Steps

If you have a sloped or split-level garden, there is no easier way of using cinder blocks. You can quickly build a set of steps using these blocks.

All you need to do is dig out an area. Then calculate how many steps you will need and lay the first concrete block bed.

Fill the holes with gravel, and lay your next laver of blocks while leaving the first row as your first step. Another way if you have a winding path, is to put them on their sides and use one block per step. (Read Trellis For Cucumbers)

Patio Furniture

You can very easily add some furniture to a patio or a front porch. Take two stacks of three double cinder blocks and space them apart.

With two lengths of strong timber, you can rest these in the two holes and cover them with concrete pavers.

This makes a very durable bench that will last for years and can easily be moved if required. Once you have constructed a small one, you can see there is no limit to the designs you can come up with.

Walls

For any person who loves tackling some DIY, cinder blocks can be an easy way to construct walls. A block wall doesn’t need to be just straight and flat because these blocks are very versatile.

You can rotate the double blocks, so they sit sticking from the face of the wall. These quickly become cinder block planters, and not only is this a unique look, but it makes it ideal for holding pots. This can be the easiest way you can get into cinder block gardening.

Space these out, and the wall can become highly decorative with flowers, or it is a fantastic addition to vegetable gardens for utilizing vertical space and growing herbs or other small vegetables.

Learn How to Build a Cinder Block Garden (2)Starting a Veg Garden

As useful as cinder block is for use around the garden, nothing beats their applications when it comes to ideas for a garden bed.

A DIY raised garden bed is super simple to make, and it won’t rot the same way a wooden one will do.

Not only this, but you can make it just one layer of cinder blocks in height, or you can make it smaller and higher, so it is suitable for growing potatoes.

To make a cinder block raised bed, all you require are around 20 blocks for a single layer. This is enough to make a bed that is 7 blocks in length, and each end has 3 blocks.

To make this raised bed, you may need to dig the ground level where the blocks will sit.

Once you do this, lay them out in a rectangle, and fill the holes with earth or gravel. This gives stability.

Like any raised bed used for container gardening, you line the inside with weed control fabric or plastic sheet that contains plenty of drainage holes.

A cheaper alternative is one or two layers of old cardboard. This stops the grass from growing through your soil.

The best soil to use is potting soil, this should be high quality, and if you already have compost, it doesn’t hurt to mix this in.

Keeping the soil as light as possible allows for faster root growth and better drainage. You can remove one of the blocks if using a wheelbarrow, this will enable you to dump your soil quickly.

If you fill the holes with soil rather than gravel, you can use these as planters for herbs, so there is no space wasted.

Once you have this, you are ready to decide what veggies you wish to grow, and as these cinder block container gardens are raised, you actually require fewer gardening tools to plant and tend for your vegetable gardens.

Learn How to Build a Cinder Block Garden (3)

Learn How to Build a Cinder Block Garden (4)

Tim Graham

With over 20 years of hands-on gardening and landscape design experience, Tim Graham, the founder of YardandGardenGuru.com, is dedicated to sharing expert advice and fostering a vibrant community for garden enthusiasts. His award-winning designs and sustainable practices reflect a deep-rooted passion and expertise in horticulture. Connect and cultivate your green thumb with Tim!

Learn How to Build a Cinder Block Garden (2024)

FAQs

How many cinder blocks do I need for a 4x8 garden bed? ›

20 blocks will give an interior bed area of 4′ x 8′. Leave a side open to bring in the soil until the new bed is filled. No mortar or special installation is necessary unless you desire a bed which is higher than 8″ raised over the surrounding area. Just set them on the ground!

How do you make a cinder block garden bed? ›

How to Build a DIY Cinder Block Garden Bed
  1. Calculate the Dimensions. A typical cinder block is 8 x 8 x 16 inches. ...
  2. Mark Off the Area. ...
  3. Prepare the Ground. ...
  4. Arrange the Cinder Blocks. ...
  5. Add Another Layer of Blocks (Optional) ...
  6. Fill Perimeter With Dirt. ...
  7. Fill With Topsoil and Plant.
Feb 27, 2024

What do you put on the bottom of a cinder block planter? ›

Here's How to Make a Raised Bed Garden with Cinder Blocks:

Lay down some weed fabric, cardboard, or newspaper, and add your soil to both the main bed and all of the holes in the blocks. If you like to sit while you garden, leave a couple of the holes in the blocks empty. Then start planting.

Can you use cinder blocks for a vegetable garden? ›

Wood is a common choice. Bricks and stones are good options, too. But if you want something cheap and attractive that's not going to go anywhere, you can't do better than cinder blocks. Keep reading to learn more about raised garden beds made from concrete blocks.

How long do cinder block garden beds last? ›

Although it costs more to create these concrete raised beds, they are pretty permanent. We plan to use ours for over 20 years, so our pro-rated cost per bed over time (for both soil and blocks) is under $18 per year.

How many cinder blocks for 500 sq ft? ›

With these dimensions, it will cover 10 × 50 = 500 square feet. If you use a standard 16" x 8" block, the area of a single block is 128 square inches, and you will need 563 concrete blocks, as 500 ft² / 128 in² = 72,000 in² / 128 in² = 562.5 (rounding up to the nearest whole number).

Can you lay cinder block on dirt? ›

It wouldn't be recommended if you are in an area where it will freeze. The dirt will hold moisture, and when it freezes could split the block. Really not a big deal for a planter bed, but it can happen. If it never freezes, have at it, it will not be a problem.

Do cinder blocks make good garden beds? ›

Building a raised garden bed out of concrete blocks can be a good idea, but it is important to make sure that it is done correctly. Concrete blocks can be durable and provide a stable base for a garden bed, but they can also be prone to cracking and damage from the elements.

How do you level ground for cinder blocks? ›

Tamp down the dirt with a hand tamper and keep it level. Fill the trench with about 3 inches of paver base, spread it with a rake and tamp it down. Tamping the base provides a strong foundation. When it's all level, you can begin installing the block.

How many cinder blocks do I need for a raised garden? ›

Prepare the Site and Lay the Anchor Block

Building a raised bed to last will require some hard labor but after it's done the bed will last for years to come. It will take 32 concrete blocks and 16 caps to build this raised bed. The first anchor block will take the longest to set in place.

Why put cardboard in raised beds? ›

It acts as a physical barrier to block out pernicious weeds. Usually, 2 – 3 layers of cardboard will suffice, though you may want layers in more weed-prone areas. The damp environment created by the cardboard is conducive to earthworms and other beneficial soil microorganisms.

Should you put landscape fabric under a raised bed? ›

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 plants grow well in cinder blocks? ›

I planted each of these cloves in its own cinder-block hole. Each one will grow into a full bulb. I also planted two bunches of basil, two bunches of cilantro and one bunch of oregano. Each of these grows in its own cinder-block hole as well.

What is the difference between a cinder block and a concrete block? ›

Cinder blocks are hollow rectangle-shaped structures usually made of concrete and coal cinders which find use in construction sites. Concrete blocks often, on the other hand, are flattened constructs made of steel, wood or cement.

Can cinder block grow mold? ›

Cinder block walls are strong, long-lasting and resistant to elements such as wind and rain, however, they are still subject to the effects of mold growth.

How do I calculate how many landscape blocks I need? ›

You could measure the perimeter of the space and divide it by the length of the blocks. For example, if you are using 10” long blocks (0.83 foot) and your perimeter measurement is 180 feet: 180 / 0.83 = 216.87 blocks. Round up to the nearest whole number.

How many cubic feet does it take to fill a 4x8 raised bed? ›

If you're planning a 12-inch deep raised bed, you'll need approximately 24 cubic feet of soil to fill a 4x8 bed. A depth of 18 inches will require approximately 36 cubic feet of soil. The type of soil you use will also affect the volume required to fill your raised bed.

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