In this instructable I'll try to show you how to build a planting tower out of 1 meter of PVC pipe. The planting tower can be used (based on the diameter) for strawberries, lettuce, (bigger pipes) pansies and other small summer flowers (smaller diameters)
I made a couple of them already and the minimum diameter is 125mm otherwise there is not much room for soil anymore.
Ready to get started?
First you determine the 4 sides of your PVC tube. This can be easily done by calculation Pi * outer diameter / 4. In my case the outer diameter is 200mm
3,14159 * 200 / 4 = 157,07mm or 15,7 Cm.
Now you take your scrap piece of cardboard and cut out a piece of 15,7cm long and mark the center of this piece of cardboard. (You are going to use this piece of cardboard later)
Put a random mark on top of the pipe and use the cardboard strip to put the next mark 15,7cm further and than the next and the next. You should be ending at approx your first mark. Mark one line as "Front" and two marks as "Side" the back isn't used.
Use a plumb line or something similar to copy the marks to the other side of the pipe.