Dimensions
The volume size of the container will limit the size and potential of any variety of bamboo. A timber bamboo with “60’ planted in the ground” potential will likely grow to 15’ in a 6’ box.
Rectangular planters allow the rhizome to spread out and will produce a better hedge of canes for privacy.
Smaller pots produce bonsai style, ornamental bamboos and need to be watered every few days throughout summer.
Minimum size: ≈1 0” X 10” container is a fair minimum size to grow and sustain a handful of 6’ canes.
Circular, bowl shaped pots are ideal, but bamboo will grow in a square pot too. Make sure the sides of the pot are straight or better yet, slightly outward tapered to allow you to extract and service the bamboo.
Growing in a plastic nursery pot and using that pot as a removable insert for a larger ceramic can make it easier to disassemble.
Rectangular Boxes
Galvanized aluminum tanks have become popular and have their pros and cons. Their general dimension of 6’ x 2’ x 2’ though, whether you build something or buy, will produce and sustain a nice display of upwards to 15’ canes.
20” is a good minimal depth to support 10’+ canes. A half-barrel size pot can house an impressive, specimen sized bamboo. Whichever you choose, containers shorter than 30” need to have a bottom and preferably be installed over hard surfaces.
Drainage is crucial, drill 1/4” - 1/2” holes as need to ensure adequate drainage.