Estimate how much mixture you need, according to the size of your mould, it’s best to make more than you think you will need. Have on standby an additional smaller mould, so you can use any leftover mixture on instead of it going to waste. Decide what side of the mould you are going to use (the inside or outside).Spray area with cooking oil or cover with wrap (to assist removal of pot from mould)
Add the three dry ingredients first and mix well. Add bonding adhesive (about 3/4 cup diluted with a couple of cups of water). GRADUALLY add more water to the mix to form a consistency of cottage/ricotta cheese (it should hold together in your hand when squeezed). Allow mixture to sit for a few minutes.
Start with the base & add a layer 3-4cm in thickness. Tamper down firmly with your thumb to remove air pockets. Work your way around the side walls (2-3cm thick). Use your finger to make a drainage hole in the base. Smooth off all edges. Once finished, cover your creation with plastic and place in a shady location for a couple of days.
Two days later: Carefully remove the pot from mould (your pot has not yet cured and is fragile). Use sandpaper or a metal brush to smooth or rough up the texture of your pot according to what type of look you are after.
Recover the pot with plastic and place back in a shady area for at least three weeks.
Three weeks later: Remove plastic and immerse your hypertufa pot in a mix of 90% water and 10% vinegar for 10 minutes (this will remove the excess lime from the pot and make it more plant friendly). It is now finished! Initially your pot will look rather ‘new’ however once planted out and regularly watered your pot will take on an aged natural ‘mossy’ patina.