Once you have decided a raised bed is right for you it’s time to get started.
The first thing is to decide where the bed will be located. A raised bed can be placed anywhere, even over a solid surface such as concrete. Any spot with enough sun for whatever it is you decide to plant will work fine.
Just remember, if you put a raised bed over a solid surface, a layer of gravel will be needed to promote drainage. Try to avoid placement too close to a large tree. The tree’s roots will try to grow up into the rich soil of your bed.
When the location has been decided, it’s time to decide on size. It is best not to make a bed over four feet wide. A wider bed makes it difficult to reach the middle.
A bed can be built of many different materials including natural stone and precast wall stones. The most popular choice seems to be wood or the newer “plastic lumber” that is now available. Do not use pressure treated lumber. Use a wood with natural longevity such as cedar, redwood or cypress.
When building a raised bed out of lumber, here are the basics: Purchase the lumber and cut it to size. Predrill the holes and fasten the bed together with screws. Support braces are used to secure the multiple stacks of the bed together to reach the desired height. Pipes driven into the ground and secured to the bed with pipe hangers keep the bed stationary. Pipes can be mounted just to the lumber of a bed positioned on a solid surface. These pipes should be positioned across from one another.
These pipes act as a support for an overhead framework for row covers, shade cloth or frost protection. Insert a smaller diameter rod into the pipe and the other end into the opposing pie to form arches. These arches will support your various materials.
After the bed is built it can be filled with a soil and compost mix. You will first want to add rock for drainage if on a solid site. Hardware cloth can be installed on the bottom as well to prevent rodents from tunneling into the bed. A thick layer of newspaper or landscape fabric can be added if desired to prevent weeds from coming through. After the soil mix is added it can be watered in. Allow it to settle for a day or two and you’re ready to plant.
Raised beds can be planted with most anything you would plant in a vegetable garden. Some vining plants can even be added and trained up a trellis system. Heavy mulching will help retain moisture and prevent weeds.
I’m planning on building a raised bed to grow additional raspberries. The options are nearly limitless.
I’ll see you in the backyard!