Pennisetum alopecuroides (Cenchrus alopecuroides) 'HAMELN' Chinese fountain grass
Symbivit Tric (arbuscular)
Symbivit (arbuscular)Pennisetum
The genus Pennisetum, first described in 1812 by the German botanist Johann Heinrich Friedrich Link (1767–1851), was for most of the 19th and 20th centuries understood in a very broad sense and included 80 to 120 species distributed across the tropical and subtropical regions of Africa, Asia and Australia, where they inhabit savannas, river floodplains and the margins of scrub. Its morphological circumscription relied mainly on the characteristic cylindrical inflorescences with dense bristles, which led to the gradual inclusion of species that were similar in appearance but not in true relatedness. As early as the turn of the 19th and 20th centuries, botanists such as Eduard Hackel (1850–1926) pointed out this inconsistency, but it was not until molecular studies at the end of the 20th century that it was demonstrated that the genus is, in fact, a botanical assemblage of superficially similar species lacking a common ancestor, and that most of them rightly belong to the genus Cenchrus, which also has nomenclatural priority dating back to 1753 through the description by Carl Linnaeus. The transfer of species to Cenchrus has now been adopted by major botanical institutions, although the name Pennisetum remains in horticultural use for the sake of stability and long tradition. Fossil evidence for the genus is lacking, but its evolutionary development is associated with the expansion of savanna grasslands in the late Tertiary, when the group adapted to seasonal fluctuations in moisture, intense sunlight and fire disturbance.
Pennisetum (Cenchrus) alopecuroides, Chinese fountain grass, described by the Swedish botanist Carl Peter Thunberg (1743–1828) during his work in Japan, originates from East Asia, where it grows in moist meadows, river floodplains and along the edges of light woodland. It reached Europe in the 19th century together with a new wave of ornamental grasses introduced by botanical gardens as exotic novelties, and it quickly gained popularity thanks to its compact clumps and fine, cylindrical inflorescences, which appeared more refined than many native species. In Asia it also had practical uses, as related species served as fodder or as material for small craftwork, while in Europe it became one of the cornerstones of modern naturalistic plantings, valued for its reliability, longevity and ability to blend visually into the Central European landscape.
The cultivar Hameln of Chinese fountain grass has earned its place among the leading ornamental grasses through several notable qualities. One of them is undoubtedly its ability to maintain a compact, tidy form and an already well‑developed appearance at a time when most grasses are only beginning to grow. It forms dense yet soft clumps, more regular and lower than the species, usually around 60 to 80 cm tall, with gently arching leaves that create a soft, slightly uplifted cushion‑like habit. The inflorescences appear reliably from mid‑summer and have the typical cylindrical shape with fine bristles that catch the light with a silvery sheen and glow like tiny lanterns in the evening sun.
Another important feature is its reliability in tolerating poorer soil conditions and its enhanced winter hardiness, reaching down to –29 °C. The origin of the cultivar is only partially documented: it is a European selection whose name refers to the German town of Hameln, but neither the breeder nor the year of origin is listed in any international botanical database; the earliest traceable catalogues mention it only from the 1980s.
In the garden it offers fresh greenery, a sense of ease and softness created by its arching leaves, and charming flowering reminiscent of fox tails. It combines beautifully with taller perennials suited to similar conditions, such as golden rudbeckias, upright veronicastrums and purple coneflowers; among shrubs it forms an attractive contrast with panicle and smooth hydrangeas, and it can soften the presence of evergreen photinia, Portuguese laurel or smaller cherry laurels. In modern landscapes it looks striking in uniform rows and in elegant ornamental planters.
Last revision: 14–08–2014; 13–06–2026
Chinese fountain grasses require a sunny position and well‑drained, rather light soil that does not remain waterlogged for long periods; in heavy clay a drainage layer or planting on a slight mound is essential. They grow best in moderately fertile soils but tolerate poorer conditions provided they receive sufficient light and warmth. Watering is needed only in the first year after planting and during extreme drought; otherwise they are reliably undemanding. Cut them back low to the ground in April, when the risk of severe frost or late snowfall has passed; the old leaves protect the clumps over winter and should not be removed in autumn. Most cultivars are fully hardy, but in exceptionally cold regions a dry winter mulch of conifer branches or a thicker layer of dry leaves is beneficial, though the clumps should never be tied into bundles as is done with taller grasses. It is advisable to divide and rejuvenate the clumps every 4–6 years to maintain their compact form and abundant flowering. Their hardiness generally ranges from –20 to –29 °C, with slight variation between cultivars, so it is always worth checking the description of the individual selection.
Fountain grasses can be grown in containers, but only the compact cultivars such as ‘Hameln’, ‘Hameln Gold’ or ‘Little Bunny’ are suitable. They require a container of at least 30–40 litres, excellent drainage and regular watering in summer, as pots dry out quickly. In winter, the root ball must be protected from freezing from the sides – for example by insulating the container or placing it against a south‑facing wall – otherwise even hardy cultivars may be damaged. On the other hand, summer overheating of containers is not a problem — in fact, the additional warmth benefits the plants and supports strong growth. Larger and more vigorous selections, such as ‘Moudry’ or ‘Black Beauty’, are not suitable for container culture, as they outgrow the available space and suffer from overheating and rapid drying of the roots.
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- STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
- DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
- EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
- STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
- HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
- SHRUB - a woody plant with branches growing bushy from the ground level.
- HALF-STANDARD or MINI-STANDARD - a small tree with shorter trunk, its size is usually specified.
- FEATHERED - These are trees with branches growing already from the base of the trunk and up along the stem.
- GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.
