My garden beds are a combination of a few things I like.
1- would be raised bed gardening and in particular square foot gardening
2- Hugelkultur - this is a technique where wood is buried inside of the garden bed which greatly reduces and even can eliminate the need for irrigation. Don't take my word for it... read this, and listen to this and this For the purposes of this instruct-able I'll ask you to suspend your disbelief and lets just assume your on board with hugelkultur. If you want to debate it take it up with Paul or Jack.
Tools I used
Pipe clamps (not 100% required)
Miter Saw (can use circular saw for all cuts, but it makes it easier)
Carpenter's Pencil or Sharpie
Mattock (not required but suggested)
Kreg Jig - I used the Jr. version
3" 5/26 galvanized lag bolts Quantity: 12
5/16 lock washers Quantity: 12
Ondura Corrugated Roofing Sheet ** Quantity: 2
Galvanized Roofing Nails Quantity: 50 to 100....
Pressure Treated 8' 2x4 lumber* Quantity: 9
2.5" Kreg Screws Quantity: 56
Note: I would suggest getting your bolts at a place that sells them by weight such as tractor supply. It will end up being a lot cheaper.
Cut List for 2x4s
8' (note does not require cut) Quantity: 4
4' Quantity: 4
17.5" Quantity: 14
* My research indicates that current, modern, pressure treated lumber is safe for use in the garden. Please do your own research and present facts rather than flames should you choose to comment on this material. A more expensive alternative would be cedar or redwood.
Please before you spout off about "arsenic" in the comments be aware that ACQ treated lumber does not contain this substance!
**Ondura is light, easy to work with and cheap. However if you are uncomfortable with plastic in your garden you can use traditional metal roofing for this project