The project came together in an easy afternoon at the shop, and what's best, I got to use my brad nailer for the first time - bonus!
Inside the containers I planted a black jack fig tree, meyer lemon tree, and an unknown varietal of avocado that I started from seed 6 years ago. All in all, I think they really spruce up my backyard.
Step 1: Source a plastic barrel
I paid $10/barrel and bought two of them, one blue and one white, from a nice guy who was using them as rain barrels, but had just upgraded his system to something larger.
Step 2: Cut barrel
To mark an even cut line all the way around the barrel I simply held a marker in place at the height I wanted to cut at and spun the barrel around keeping the marker stationary - voila.
To make two smaller planters instead of just one huge one, cut the barrel in half and DON'T cut the top of the barrel off, since that will now become the bottom.