It still amazes me how versatile this material is. Although this is a simple project I'm really impressed with how it turned out. It takes very little time because of the PVC 'moulds' and they can easily be batched out because the moulds are reusable.
Step 1: Build the Form
Cut the big and small pipe to the same length. The length of the big pipe will be the total height of the pot.
Cut the dowel to roughly 100mm.
Drill a hole into the centre of the push on cap so that the dowel can only just slide through. This will be the drainage hole so don’t make it too big. I used a 9.5mm dowel.
Apply some WD40 to outside of the big pipe at one end and the inside of the push on cap. Push the cap onto the pipe.
Push the dowel into the cap so that half is inside the pipe.
Step 2: Add Concrete/Mortar
Apply WD40 to the inside of the big pipe.
Mix up the mortar/concrete and fill bottom of the mould with around 30mm. This will become the base of the pot.
Apply WD40 to the outside of the small pipe and place it gently onto the mortar/concrete, in the centre of the big pipe.
Now fill concrete/mortar around the outside of the small pipe. Add the concrete slowly making sure the small pipe stays in the centre.
Once the mould is full, tap is to remove air bubbles and level out the concrete/mortar.
Cover the mould with plastic and allow to cure for 2 days. After that remove the plastic, and cap on the base, and leave it to dry for another day.
Step 3: Seal/Paint
Gently slide the big pipe off the concrete/mortar. This might require some finesse and ingenuity. Once it’s free remove the inside pipe.
If you want to paint the concrete/mortar, now’s the time. After that give the whole piece a coat of sealer. This will ensure the concrete doesn’t stain.