Pot size is the diameter of the top of the pot. We base the sizes of our plants off the pot size so we have a standard measurement to categorize the plants by. We’re a bit old fashioned, as we’ve been in the nursery business for 3 generations now, so we give our pot sizes in inches. So a 12″ Pot means a pot that has a 12 inch diameter at the top of the pot, or 30cm. In Australia, pot sizes are also measured in centimetres, which is also the diameter of the top of the pot, or litres, which is the volume.

As plants are living and grow, even whilst sitting on the shelf, we need to have a general size by which to group them by. Plants can vary in width and height in the same pot size depending on their age, the time of year and what supplier they were grown by. The pot size gives you a good idea of the maturity of the plant you are getting.

Here is a handy conversion chart: