With lovely flowers that complement the blue hue of the Blue Arrows Rush, the Blue Chaste Tree here helps to support a berm that allows water to flow into the duck pond during rains. It also produces seeds that the ducks love to eat, though, if left on the tree, I'm sure other birds would find their way to the tree itself to snack on the Blue Chaste Tree's seeds. 

Inland Sea Oats or River Oats produce oat seeds that provide food for the ducks in the cool seasons. Their interweaving root systems also help to lock the clay soil in place to prevent erosion of the duck pond. The combination of the Juncus Inflexus with the Sea Oats help to create a meadow-look to the sides of the duck pond. This also provides plenty of protective cover for the ducks and helps to keep the sun from baking the soil in the hot summers. 

When the hue you are looking for is blue and a little heavenly, it is difficult to compete with the tall and stately stature of the lovely Angel Mist Bamboo. Planting Blue Arrows Rush around this lovely clumping bamboo will give you the power of the Juncus's deep growing roots and the large, interweaving roots of the Ghost Bamboo, which also produces culms that can be used for crafts and home decor. 

Looking for a vibrant contrast in your pond-side, soil-stabilizing meadow? The Japanese Blood Grass is a fast-growing, bright and beautiful plant to grow behind your Blue Arrows Rush, as it does like moist soil, but is not a pond plant, the Blue Arrows Rush can be grown with its roots submerged and blend right into a glowing grassy field of Japanese Blood Grass.

Using the Juncus Inflexus to zone push tropicals is another idea, while also allowing the rhizomes of the Truly Tiny Banana plant to add soil stability to another side of the duck pond. It is certainly the permaculture way to allow every plant to do multiple jobs. Despite being a smaller banana plant, topping off at 3 feet, the large leaves of this banana plant will help to shade the sides of the duck pond, preserving necessary moisture so that the plants that support it can grow at top speed, creating a weave of roots around every side of the pond. 

Tree collards come in several different colors ranging from purple to green to bluish. Using a row of Blue Arrows Rush as a support, tree collards can grow quite merrily alongside a pond where they can benefit from the ducks running in and out of the water and dripping the nutrionally dense pond water to the tree collards everyday. The tree collards will also add more cover to the pond and some shade to some of the Blue Arrows Rush.