I have gardening planter boxes for sale. Built to last. Made from 2-inch X 12-inch treated lumber. All different sizes available. The depth is 12 inches and the width is 12 inches. The length can go anywhere from 2 feet - 8 feet. You decide what length best suits your needs and I'll put it together for you. These are the only planter boxes I use for my gardening. I have a healthy crop of cherry tomatoes, lettuce, green peppers, carrots, regular sized tomatoes, corn, and string beans every year. All grown in these boxes that I made for myself. I find something wonderful and magical about growing your own food. I also find something wonderful and magical about building my own planter boxes. Probably goes back to the wood shop my beloved and Sainted Papa had in his garage when I was younger. Maybe it's the nostalgia and simpler times I find so appealing as well.
The 2-foot planter boxes are 50$.
The 3-foot planter boxes are 75$.
The 4-foot planter boxes are 100$.
Any size planter box from 5-8 feet is 125$.
I can make as many of these as you need. I much prefer my treated lumber planter boxes to the cedar planter boxes that you mainly come across. The wood is much sturdier and isn't prone to rotting like cedar. It's built to withstand the elements year after year. And if space is limited, you can put these planter boxes anywhere and your vegetables and flowers will grow. I think this obviously goes without saying but you never know in this day and age, the longer the box, the heavier they are.
Unfortunately, the prices are firm. With how expensive treated lumber is currently, I don't have any wiggle room.
Enjoy your summer gardening. I think in another life, I was probably a farmer in the old west hahahaha