N
Glam Journal

How do you install a raised garden bed

Author

Matthew Shields

Updated on April 17, 2026

What do I put on the bottom of a raised garden bed? The bottom of a raised garden bed should be a layer of grass clippings, leaves, wood chips, straw, and other organic material. The cardboard should be placed on top of that layer. The organic material will turn into compost, while the cardboard will prevent weeds.

What do I put on the bottom of a raised garden bed?

What do I put on the bottom of a raised garden bed? The bottom of a raised garden bed should be a layer of grass clippings, leaves, wood chips, straw, and other organic material. The cardboard should be placed on top of that layer. The organic material will turn into compost, while the cardboard will prevent weeds.

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

You should avoid putting rocks or gravel at the bottom of your raised garden beds, or any of your planters or containers for that matter. … With your buried rock layer trapping water beneath your soil, problems with fungal growths and root rot are more likely to occur.

Do you put a liner in a raised garden bed?

So, should you line a raised garden bed? Yes, you should line your raised garden bed, since the pros of doing so outweigh the cons. A liner for your raised garden bed can insulate the soil against extreme temperatures, keep moles and gophers out, and prevent weeds from growing.

Should you line garden beds with plastic?

Avoid lining your garden beds with plastic, as this prevents drainage and could drown your plants’ roots. If you have a weed and pest problem, consider installing a combination of metal mesh and fabric or hardware cloth and cardboard to get both benefits at once.

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

For a 4×8 raised garden bed, you will need 15 bags of soil (1.5 cubic feet per bag) or 21.44 cubic feet of soil. This is assuming your raised garden bed is 8 inches high and the bags of soil you are buying contains 1.5 cubic feet of soil per bag.

How deep should raised beds be?

A raised bed does not have to be very deep to be effective. Eight to 12 inches is usually adequate. If drainage is a problem, or if the plants you are growing prefer drier soil, the bed could be taller and filled with a porous growing medium. Vegetable beds should be 12 to 18 inches deep.

Should I put cardboard in raised beds?

If you are creating raised garden beds, you can prevent weeds from growing into your raised bed by first putting down cardboard. … But once you do have your cardboard down under the garden bed, just fill it with your raised bed soil and you should have limited weeds coming from below.

What is the best height for raised garden beds?

The most popular height for raised beds is 11″. (This is the height of two standard “2 x 6″ boards, which actually measure 1.5″ x 5.5”.) This height provides sufficient drainage for most crops. For best results, there should be another 12″ or more of good soil below the bed.

What is the best way to line a wooden planter?

Line the entire planter with a sheet of plastic, trimming it so that it reaches but does not go over the rim. Staple the plastic all the way around the rim. Using a screwdriver or sharp stick, poke through the drilled drainage holes to let excess water drain out of the plastic liner.

Article first time published on

What do you line a garden bed with?

You can line your raised bed to make it more durable and to prevent toxics from leaching into the soil. For lining, use landscape fabric found at garden supply stores or cloth fabric from clothing. Avoid non-porous plastic, as it can retain too much water and discourage beneficial insects and worms.

Does a raised bed need drainage?

Drainage is very essential for raised bed gardens. It is essential in order to prevent root rot problems. Poor drainage makes the soil to become waterlogged. This eventually becomes a breeding ground for root fungi.

Do you need landscape fabric for raised bed?

Do’s for Your Raised Garden Bed Of course, you don’t have to excavate if you don’t want to. You can simply remove any grass or weeds from the spot where the bed will sit, and then add layers of newspaper, cardboard or landscape fabric to smother anything that might grow back.

Do raised planter boxes need drainage?

Planters provide a more controlled environment for your plants. … While there are some plant species that tolerate wet soil, most plants require moist, well-draining soil, making adequate raised bed garden drainage essential.

Is it OK to use treated lumber for raised garden beds?

Modern Pressure-Treated Lumber According to the American Wood Protection Association and the U.S. Environmental Protection Agency, lumber treated with ACQ is safe for garden use. Its durability and nontoxicity make it among the best woods for raised garden beds.

What should I line my planter box with?

You need to line your planter box if it’s made from wood or metal. The liner will help prolong the planter’s life. You don’t need to use a liner if the planter is made using plastic, ceramic, or concrete as they are quite durable by themselves.

How deep does a raised bed need to be for tomatoes?

Calculate the estimated volume of soil needed for the project by measuring the length times the width times the depth of the raised bed; the bed should be at least 12″ deep to give the roots room to grow and allow for proper drainage.

Can you grow corn in raised beds?

Sweet corn can thrive in a raised bed, but because of the plant’s wind-based pollination, it calls for a little extra attention concerning how plants are spaced.

What kind of wood should I use for a raised garden bed?

Cedar and redwood are naturally water-resistant but can be expensive and hard to find. Hemlock, fir and pine are suitable materials for raised beds but aren’t very long-lasting. Pressure treated lumber is an option. Pressure treated lumber has been a controversial topic for many years.

How deep should a raised garden bed be for potatoes?

Raised beds should be at least 12 inches deep and filled to about six inches with a good planter mix and lots of compost. Locate them where they will get at least 4 to 6 hours per day of unobstructed sun.

How do I calculate soil for a garden bed?

  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 best size for raised vegetable beds?

Optimum Size for Raised Beds Beds against a wall or fence should be about 2-3 feet (60-90cm) wide, as you’ll only have access from one side. Aim for a minimum height of 6 inches (15cm), while up to a foot (30cm) is ideal for root crops. Make sure to leave enough space for access between beds.

How do you start a raised vegetable garden for beginners?

Start small, and only grow what you know you and your family will eat. If planting in the ground, a 10′ x 10′ garden (100 square feet) is a managable size. Pick 3 to 5 of your favorite vegetables and buy 3 to 5 plants of each one. If planting in a raised bed, a 4′ x 4′ or 4′ x 8′ is a good beginner size.

What can I plant in a 4x8 garden?

For me, that means lettuce and other greens, like spinach, Swiss chard, kale, and baby bok choy, cucumbers, onions, a variety of herbs, peppers (I usually plant at least one hot pepper to make habanero jelly, and a variety of other sweet peppers), the odd root veggie, like beets and carrots.

Can I line my raised garden bed with cardboard?

While you can use most any type of cardboard to line the bottom of your raised bed, you can expect the thicker, multilayered sheets of cardboard to work best. Their sturdy, corrugated structure allows them to resist decomposition far longer than flimsy single layered cardboard.

Can I use pressure treated wood for a raised vegetable garden?

Yes! Pressure-treated wood is safe for vegetable garden beds but with some precautions. The crops should be grown 10 inches away from CCA treated woods to prevent leaching of the chemicals into the plants. Heavy impermeable plastics can also be used to act as a barrier between the crops and the wood.

Do wooden garden planters need lining?

A wooden planter is a great way of creating a bed to grow plants and vegetables in if you are short of space. … However, if positioning your planter in full sun, you may consider lining the inside of the planter with pieces of old compost bag, to keep the compost moist and reduce the need for regular watering.

Do you need to line garden planters?

The best way to prevent deck planters from rotting is with a liner. Lining a wood planter prevents water and fungi from contacting the wood. … For a small planter, every fall, emptying and cleaning out the planter will prevent rot. With the wood drying out over winter and fungi slowed without dirt or water.

What do you put in the bottom of a wooden planter?

A wooden planter should have drainage holes in the bottom to prevent water-logged soil. If the holes are too large, though, some of the soil itself may be washed out of the container, so cover the bottom of the planter with landscaping fabric to prevent soil loss.

Should planter boxes have a bottom?

Raised beds are not the same as garden planters. Planters are elevated containers which have bottoms to prevent the soil from falling out. … Raised beds, however, do not have bottoms; they are open to the ground, which offers the benefit of permitting plant roots to go further into the ground for available nutrients.

Can you overwater a raised bed garden?

Because raised beds have good drainage when done right, it is important to be diligent in watering them while avoiding overwatering them. According to University of Florida IFAS Gardening Solutions, the soil underneath the surface of the soil should be slightly moist.