How deep should a raised garden bed be?

May, 2022
Darren Spalding

Small raised beds (under 4 feet) · Medium raised beds (4-7 feet) · 4 × 4 raised bed First you need to decide the dimensions of your planters. Small raised beds (under 4 feet) · Medium raised beds (4-7 feet) · 4 × 4 raised bed First you need to decide the dimensions of your planters. Before setting up your raised beds in their permanent location, be sure to remove any grass or perennial weeds from the area. Use a garden fork or shovel to loosen native soil to 6-10" deep.

I built this last spring and used 1"x4" cedar for the soil before putting the landscape fabric and all the soil in. Held well until this spring, and the whole soil collapsed.

What do you put in the floor of a raised bed?

The first drawback to using rocks as a barrier is that many of them are needed to completely cover the floor space of your raised bed. So what do you put on the floor of a raised bed? Ideally, a barrier should be placed between your garden soil and the soil at the bottom of a raised bed to prevent weeds from rising up. If you have several deep and large raised beds, you can buy the soil in bulk from a local company. Even if you don't get newspapers anymore, there are plenty of places to get your hands on some for free.

Which size is best for a raised bed?

One of the ideas with a raised bed is that you can reach the middle without having to climb in. My other option is a high garden, but I'm not sure if it needs to sit on the ground and whether it should have a floor or no floor. If the raised bed consists of rocks or blocks, there is no set length. But remember that gardeners need to bypass the entire bed without any problems. This method uses more materials and is therefore a bit more expensive, but the shorter garden beds are structurally stronger as the end sections only have to support shorter side lengths, making the structure stiffer.

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