So, this is an explanation post for all my wonderful gardening buddies. It's about containers.

This year, I need to re-pot the blueberries. This means that I have to know how big the containers should be that I want to purchase. In general I have to know how many gallons of potting soil go into the container. This is because many containers are labeled by "gallons." To find out the potential capacity I use the equation:

I know that most pots are not straight sided but it's much easier to assume that the pot is straight sided than to go through all the complications that trying to figure out roundies and slopes would bring.

So my biggest pot is 17" x 17". That means the diameter across the top of the pot is 17 and the radius is 8.5. 8.5 x 8.5 = 72.25. In this equation I will round the numbers to the first two decimal places.

(3.14 x 72.25 x 17)/231 = (226.87 x 17)/231 = 3856.79 / 231 = 16.7

Now I know that I will need pots that can handle at the very least 16.7 gallons of potting soil. So a 20 gallon pot would probably be a good idea.

I think it's time for a trip to Amazon! :rubs her hands together and chuckles in anticipation: