Creating a raised garden, more commonly called a raised bed garden, can be as simple or as complicated as you wish. The basic building materials include items you likely already have around your house. Although it might take a lot of time and effort, the expense of creating a raised garden is only really incurred if you create a border or retaining wall. Building a basic raised bed garden mainly requires essential planning.
Decide what number of beds you want in your raised garden. Make beds no wider than 4 feet so that you can easily reach to the middle for weeding, tending and harvesting; the length can be as great as you want.
Measure out your desired number of beds in the garden. Place disposable chopsticks or Popsicle sticks at each corner as markers. Tie string around the sticks to create a temporary border that delineates where each bed will lie. Make adjustments as necessary before proceeding.
Soak a bunch of old newspapers and arrange within the outlines of where you want your raised beds to go.
Mix soil and compost together in a 1:1 ratio. Add 1/3 peat moss or coir into this mass until it's thoroughly mixed.
Pile the soil mixture high inside the string borders delineating your boxes. Pat it into a mound that is at least 1 foot high.
Repeat this process for any and all other raised beds in your garden plan. Remove string and disposable chopsticks or Popsicle sticks when you are done. Proceed with planting in your new raised bed garden.