How Deep Should A Raised Garden Be?

How deep should a raised garden be? There are 2 different types of elevated gardens. The depth of the raised garden depends on the type of garden you are building. I will outline how deep a raised garden you should consider? The following content also has some reference value for raised garden beds.

The simple answer is, the deeper the better. The best answer is that it depends. There are usually 2 different elevated gardens:

  1. In a raised garden, the roots of plants really grow into the soil below (underground)
  2. For the raised gardens where the roots of plants do not grow to the ground (above the ground), the minimum depth guide shall be provided for each style of raised gardens
raised garden beds

Underground raised garden

The roots did grow into the soil beneath the raised garden bed.

It is easier to raise the garden. Garden beds help plants take root in the good, fertile soil you add. Once the plants grow, their roots will grow into the natural soil under the elevated bed.

How deep should this raised garden be? 4 inches minimum. However, the deeper the better.

This type of raised garden works very well because your plant has got off to a good start and you can easily plant it. You are also improving the soil at this particular location because the soil and organic matter you add to the elevated bed will filter into the natural soil below.

If you move the garden bed, you will have a beautiful and improved underground garden. You can choose to plant it or keep it as it is.

Raised garden bed on the ground

The roots do not grow into the soil under the raised garden bed.

This type of raised garden is closed, or you add a barrier between the raised garden and the natural soil. If you can avoid this situation, I suggest you do so. Creating a separate ecosystem will make it more difficult for your garden to handle properly, and may lead to problems such as drainage.

How deep should this raised garden be? 8 to 12 inches minimum. However, the deeper the better.

Remember, in this type of bed, you add all your plants. They cannot get their own nutrition or water, and you provide them with everything. Enough soil to grow comfortably, and enough fertilizer and nutrients.

How big should a raised garden be?

The optimal size of the two types of elevated gardens is the same. A 4 foot wide circle is ideal for most vegetables and other plants. You can easily reach every plant in the garden without stepping on the soil or bending over too much.

You can make any length you like.

Build the bed in the direction that best suits your property. For example, you might want to build one along a sidewalk or one side of a house. If you build in an open place, face them north and south. This will provide the most sunlight for each plant on the bed.

Why choose a raised garden?

In some cases, garden beds may be beneficial. One of the main reasons for growing on a raised garden bed in poor soil. If your soil lacks nutrients or is very sandy or full of clay, a raised garden bed can solve your problem. Raised garden beds also look great. You can put them anywhere you like, even on stone or concrete. However, if you can grow underground, I suggest you do so. You can read my article: Why should you not grow on a raised garden bed and understand why this is so.

Advantages of Elevated Bed Garden

Soil. The raised garden bed is a well-defined garden, so you can focus on the area to improve the soil. You can fill the bed with high-quality soil and add a lot of organic matter to create a beautiful growth environment.

Anti freezing and sunscreen. In a raised garden, it is easy to protect plants from frost. In hot summer, it is also easy to cover it with sunshade cloth.

Planting in advance. Raised garden beds are usually well drained. Because of this, your soil warms up faster in spring, giving you a head start in planting.

Landscape improvement. Raised garden beds look great and you can place them anywhere, even on concrete.

visit. If you have back problems or other bending problems, a raised garden is great. You can make them very high so that they are easily accessible.

raised garden bed

Soil of elevated garden

You can use existing soil in the raised garden bed, or you can buy soil to fill it. You can also use soil excavated from other places. One thing you should avoid is the "soil change line". This is an obvious line. One soil ends and the other begins. This line will cause root and water seepage problems. If you want to add different soil to the raised garden bed, mix some natural soil with the new soil to gradually change.

I have been building a raised garden with the aim that the roots of the plants will eventually grow into natural soil. In this case, it is better to use soil as close to the natural soil as possible. You can consider double digging. In a double dig, you dig out the top 6 inches of soil and move it aside. Mix the organic matter with the rest of the soil and add 6 inches back to the top. The top 6 inches is your topsoil, the most nutritious part.

If your goal is to grow only in a raised garden, and the roots of plants will not grow into natural soil, you should aim at sandy soil to help drainage. Nevertheless, a large amount of organics should be added!

Before buying soil, remember that just because you can buy it does not mean it is suitable for your purpose. For example, commercial soils made from manure may be very salty. Some commercial planting soils are too light for a raised garden to hold water at all. This can lead to a nightmare situation where you constantly struggle with the drying of the soil. Once it dries, it cannot be re moistened without serious intervention.