When choosing plants for your pond (figure A), select varieties that grow best in your climate. Marginal and bog plants do best along the pond edge, while some sink to the bottom. Floaters do just that--float along the top of the water surface. To plant a water garden, just lay the floaters on the water surface (figure B). Moore recommends dropping the plant in the water in the shallower section of the pond.
Floaters, like this water hyacinth (figure C), play an important role in filtering your pond.
Potted water plants prefer a rich garden soil to the lighter, store-bought mixes. Layer rocks and pebbles along the surface of the pots to help weigh the containers down (figure D). Then slowly submerge the plants into the pond. As the plants become more established, you may want to move them deeper into the pond.
Most plants acclimate without additional fertilizers. Exceptions to the fertilizer rule include water lilies (figure E) and lotus. If you feed these water beauties regularly, you'll be rewarded with a display of delicate floating blossoms.
Water gardens can be relatively maintenance-free. By including fish in your pond, you create your own private ecosystem. Fish provide nutrients for the plants, and the plants oxygenate the water for the fish. Keep in mind that big fish like koi need a large pond, and smaller fish are happy wherever you put them.
"The fish bring the pond to life with their swimming and movements around," says Moore. "Plus, they eat the mosquitoes that find your pond." Since stagnant water is a breeding ground for mosquito larvae, mosquito-eating fish can provide a much-appreciated service.
Water plants thrive on the nutrients provided by the fish. So if you cover the pond with about 65 to 70 percent plant material, less sunlight will reach the water, thus discouraging algae growth. Also, pond gardens shouldn't be drained often. Once you find the natural balance of your water garden, nature will take care of the rest.
If you build it, critters will come. From turtles and birds to frogs and bugs, water gardens can be an entertaining creature feature. "Just listen," says James. "The calming force of the water combined with the natural beauty of the plants--now there's a serene symphony that can grow on anyone."