First, just as an anecdote, one side of my family are Trusses, and an ancestor great-great-great was the founder of Trussville. I'm descended from one of the younger ones who had to move on (because the farm was taken by the older brothers) to the Oklahoma land run and then, in the Great Depression, to California. The family "hit the edge" so to speak and has bounced back eastward to Colorado and Oklahoma. Go figure. Anyway, I have bamboo surrounding a pond in which I have a pond liner--one of those heavy duty, industrial strength things. Under the manufacturer's advice, we put old carpeting underneath the liner to protect it from incursions like the one you foresee. Water itself will stop the bamboo (they don't like to get their feet wet, just damp). But, under a liner it gets dry and the roots will explore the area for a vulnerability. So, old carpeting is the first line of defense, followed by the poly liner membrane. Better safe than sorry! Hope that helps. --Robert

Although I'm a big fan of rhizome pruning, there's no guarantee you'll always get everything the first time. This usually isn't a problem...you just go after the straggler you missed. However, in your case, the first time you might see this straggler is when it comes up through the pool. Bamboo can penetrate things much thicker and tougher than that liner. I'd say your safest options are: clumpers, runners in pots, or planting a good distance from the pool.

Thank you Bill. I tried to find this info on the internet and I did find lots of info about castor beans but not a thing about how large the roots would get. I appreciate the info and can now plant in confidence. Deb

Most people do not want deciduous trees too close to a pool on account of tree debris getting in the water. Too, the space you've allotted for a tree is not enough. The "bed" to the right of the tree is seriously too small to be good for anything thing. But on that side of the deck is the better place for a small tree. Enlarge that bed substantially and put the Japanese maple over there. Around the pool you are only allowing enough room for perennial. There are many options for perennials but hybrid daylilies come to mind and one of the cheery looking, longer blooming ones.