Common bur-reed (Sparganium simplex).

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Bur-reeds are very original plants with graceful leaves and prickly spherical inflorescences. They grow quite quickly, forming picturesque thickets, but due to their aggressiveness they are used to decorate only fairly large decorative ponds. In addition, they (especially the erect bur-reed) can be dangerous for artificial ponds with a film bottom, since their roots can easily pierce the film. In small ponds, it is better to plant the floating and small bur-reeds. They are not so aggressive, much smaller in size, and their leaves look very picturesque on the surface of the water. The simple bur-reed has a simple stem, its floating form reaches a length of up to 120 cm. The small bur-reed is distinguished by flat leaves and a single male inflorescence, less tall than the erect bur-reed, the stems are tilted in different directions, and the leaves float on the surface of the water. Reaches 25 cm in height, and in the floating form - 80 cm. Blooms a month earlier. The plant is planted along the banks of stagnant or slow-flowing artificial reservoirs and in shallow south africa mobile database in the soil at the bottom or in containers with fertile soil. The planting depth is 8-12 cm below the water level. They prefer well-lit areas, but can also tolerate partial shade.

Sweet flag (Acorus calamus).
A number of varieties have been bred for ornamental gardening, in particular: Acoruscalamus 'Variegatus' - a plant with striped leaves; in spring the stripes are pink, then become cream. The plant has an insecticidal effect, which allows it to be used to decorate artificial reservoirs. The plant grows well in any marshy places, in shallow water along the edges of ponds, without requiring any special conditions. Reproduction - by division. Frost resistance is very high, but low-growing varieties tolerate winter worse than tall ones. Sometimes it is necessary to carry out special measures to prevent the plant from spreading too much. The height of the plant ranges from 50 cm to 1 m. Calamus can be replanted both in autumn and spring. The rhizomes are taken out of the water with a rake or pitchfork and, wrapped in damp moss, preserved until planting. Before planting, the rhizome is cut into pieces 10-15 cm long with one or two buds. It is better to prepare the planting site in advance. Calamus is planted like iris. Rhizome sections are placed almost horizontally at the surface of the ground or deepened by 1-2 cm, at a distance of 15-20 cm from each other. Calamus can be deepened into water to a depth of 20 cm.