Ideally, you should locate your water garden where it will receive five to six hours of sunlight so the water plants can thrive.
More than six hours of sunlight may lead to excessive algae growth. If that is your only option, however, there are other ways to control algae—you will learn about those in other areas of this website.
You can build a water garden in the shade, but plants such as water lilies may not grow and bloom as well as others that are more suitable for low-light conditions. When purchasing aquatic plants, it is best to do some research or ask your pond retailer for the plant’s specific lighting needs.