PERENNIALS FOR DIFFERENT PURPOSES : Page 605
plenty of rich soil on the bottom, and an abundance of clear water anduninterrupted sunlight. The best locations are on the margins ofsluggish streams and of bays and in sheltered nooks. Water whichflows too swiftly or is too cold or contains mud is not good for aquaticplants, nor should they be planted in newly constructed cement tankswhich have not been thoroughly washed and rinsed so as to remove allthe caustic property of the new cement. The best fertilizer foraquatic plants is cow manure, which may be mixed with twice itsbulk of strong loam and used for planting beds.
In the water near the margin of a pond many more sorts of aquaticand bog plants may be used, such as the native irises or flags, waterplantains, bulrushes, arrowheads, and marsh mangolds. Theseplants are more hardy and less exacting in their requirements. In-deed, they are likely, when congenial conditions occur, to grow soluxuriantly as to prove annoying if planted in very large quantities.A rich alluvial mud provides the proper soil for most sorts, and onceestablished where there is not too much lime in the water, or too swifta current, they will take care of themselves.