The benefits of sunken containers are similar to raised beds. They will warm faster and you won't be stepping on the plants root systems. They also allow you to concentrate resources and grow a variety of crops. The space between the containers gets filled with mulch. You can let vines grow over the mulch while the weeds stay under control. The keys to success are sinking the containers and opening holes in the bottoms. The plants roots will grow through the container's holes and into the ground. This provides some security from watering issues. I use recycled black nursery containers. They are easy to cut, cheap, and black to absorb the sun.
How to Build a Sunken Vegetable Container Garden
Visit my garden blog for more information and pictures of this years events: The Rusted Vegetable Garden
Step One: Pick Out the Space
Step Two: Place the Containers and Cut Holes
Step Three: Remove the Base Soil and Amend (if needed)
- Removing the grass
- Loosening the soil remaining in the circle (ground)
- Amending the soil in the circle (ground)
- Setting the container and returning the grass to it (only do this for large containers)
- *Toss the grass for smaller containers. You don't want it growing up if it isn't smothered.
Remove the Grass to 3 to 6 inches Deep. Or Deeper if You Wish.