--- UPDATEs per feedback (from both StackExchange and Reddit) ---
a. Bamboo species is "clumping growth," not "running" flavor. We don't have concerns about it "escaping." Does this change any perspectives about the rhizomes warping the steel planters?
b. Bottom of all the planters is open, not closed.
c. The pictured planter is NOT the one where we're placing the bamboo.
d. Low-VOC paint, if any, will only be applied to the INSIDE walls of the planter.
--- Original post format, with above modifications ---
Will large clumping-growth bamboo such as Graceful Bamboo (Bambusa textilis gracilis) warp or disfigure steel planters (see below) over a long period of time (think 10 or more years)? NOTE: the bamboo species will NOT be any of the "running" patterns.
Do steel planters negatively impact the health of bamboo over time, especially when compared to cedar wood planters?
Planter specifications: the bottom of these planters is open, not closed. The planters will be 3' (3 feet) tall, 2' wide and about 35' long. There will be significant internal bracing for said steel planters, similar or same to the planters shown in the photos below. The "Graceful" species has canes about 1" wide and can reach 30'+ tall, though I am not expecting this given the restrictions of the planters. They are currently 17' tall with more than a dozen canes in their containers (before being planted).
Is low-VOC paint or similar treatments (see below) helpful to protect the INSIDE WALLS ONLY (we love the look of the rusted-steel exterior and will not paint over it) of the steel planter from contact with soil and plant roots? Will this paint prolong the life of a steel planter? Reiterating, the low-VOC paint/root block liner/polyiso foam is only for the interior of the planter. So the question is whether any liner/sprayed product would extend the life of the planter itself and thus be worth the added time/expense. Note: to match the other steel accents throughout the back yard, the planter walls will be vertical.
The pictured planter below is NOT the one that will house the bamboo. The photos shown are simply to provide an example of what the planters will look like (although they will be in the same backyard as the photo-ed planters). The planters that will hold the clumping bamboo have not yet been built. And the bamboo planters will not be adjacent to the pool.
Any other considerations to make in addition to the points above with regards to both long-term a) bamboo health and b) steel-planter structural integrity?
Geographic location: south-central Texas, USA.
Again, the following planters are EXAMPLE photos, and NOT the planters that will house the bamboo.