Clasping-leaved Pondweed

Potamogeton perfoliatus is a rhizomatous perennial that is found in temperate freshwater or brackish habitats in still or slow-moving water. The oval, "stalk-less" leaves grow completely submerged, have slightly crispy margins, and a beautiful translucent quality. The common name, Clasped Pondweed, is derived from the perfoliate leaf bases the basal section of each leaf is wrapped around the main stem of the plant and appears to be "clasping" on. In shallower water, the leaves will be much thicker and darker than those grown in deeper water. During June to September, insignificant flowers are produced above the water's surface, and these are followed by tiny fruits. Plant up into baskets containing aquatic soil with a top layer of pea gravel to stop the planting medium from clouding the water. To begin with, place no deeper than 30cm (12") in the pond, in an area that receives a good amount of sunlight. As the plant becomes established, it can be moved further into the pond, up to a maximum depth of 1m (3ft 3"). This plant is a good oxygenator and it will provide welcome shelter for all sorts of aquatic life. It is generally low-maintenance, but it is a fast grower under favourable conditions, and may require periodic thinning out. Propagation is by seed, cuttings, or division of the rhizomes during the spring.

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