You could also use a dremel tool stone to grind the hole larger.
How to make a hole in a ceramic pot.
However i would think that with care one could use a larger core bit.
Start by drilling a small hole 1 8 inch in diameter and then gradually enlarge the hole by changing to larger bits.
Ceramic pots can be purchased quite cheaply from flea markets or garage sales.
A drainage hole helps excess water leave the soil so that your plant s roots are not sitting in a puddle rotting.
Ceramic pots and vases make for wonderful container gardens but many that you find at flea markets or specialty stores don t have a drainage hole.
We used a masonry bit to drill our hole.
Find a masonry bit.
Not knowing how small the hole is to begin with makes it a little more difficult to.
However most ceramic flower pots do not have any holes in the bottom of them which are vital for drainage purposes.
This keeps the bit from overheating and potentially snapping and the pot from cracking.
So here s what i used.
Center your drill bit so that your hole will be in the center.
At first we thought we were going to use a bit for tile but my dad couldn t find his so we opted for a masonry bit.
Scratch a small starter mark where you want the drainage hole with your nail to help the drill bit to stay in place.
Be sure that the pot is set somewhere where it is secure and won t move as you start to drill.
I ve never tried to open up an existing hole on a ceramic pot.
To find out how to drill a hole in a glazed clay pot keep reading.
To finish use a damp rag to clean off any dust and debris form the surface of the pot.
A ceramic pot can make an ideal storage container for your flowers and also for an indoor herb garden.
Set your pot upside down so that you are drilling from the outside in.
And here s how to drill a hole in a ceramic pot.
With your spray bottle in one hand and drill in the other slowly go at it.
Keep the drill bit and pot surface wet with the spray bottle.