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Rudbeckia hirta 'RUDY MINI YELLOW BLACK' gloriosa daisy
Symbivit Tric (arbuscular)
Symbivit (arbuscular)Rudbeckia
The genus Rudbeckia belongs to the daisy family and includes around twenty species native mainly to the eastern and central parts of North America. These plants are typical of bright, open and often disturbed places: prairies, woodland edges, light savannas, embankments, post‑fire sites and abandoned, unirrigated ground. All species share the same basic flower structure, with broad ray florets in shades of yellow, orange and brown and a dark, often domed central cone made up of tiny tubular florets. The genus was described by Carl Linnaeus in 1753 and named after two Swedish naturalists, Olof Rudbeck the Elder (1630–1702) and Olof Rudbeck the Younger (1660–1740), who played a key role in the early botanical research at Uppsala. In the past there was uncertainty about the placement of some species, with various authors shifting them between Rudbeckia, Echinacea and Ratibida because of their similar cone structure. Modern studies, however, have confirmed that Rudbeckia forms a distinct evolutionary lineage that has become one of the botanical symbols of the North American grasslands.
Rudbeckia hirta, the black‑eyed Susan or gloriosa daisy, is a North American wanderer of the sun, growing wherever there is light, warmth and soil that drains quickly yet never dries out completely. Linnaeus described it in 1753 and named it after his teacher Olof Rudbeck (1630–1702), a physician and botanist whose family later became connected with Alfred Nobel. The symbolism is rather fitting: Rudbeck sought to link botany with medicine, and the plant bearing his name was used in its homeland as a medicinal herb, with root decoctions taken for colds, earache and even snakebite. Its natural range stretches from southern Canada across most of the United States to northern Mexico, and throughout this vast area it appears on sunny meadows, embankments and woodland margins. It reached Europe in the 19th century and settled in quickly; in Central Europe it was first recorded in the wild in 1873. Here it is often grown as a short‑lived perennial or annual, yet thanks to its reliable self‑seeding it behaves as if it had lived on the same spot for generations. Cottage gardens, parks and public plantings welcomed it readily, as its flowers bring a bright, sunlit accent from mid‑summer into autumn and can illuminate a late‑season border where many other species have already finished their work.
The Rudy series of rudbeckias was developed by the Dutch breeding company Florensis, with the goal of creating early flowering cultivars with good performance even under less-than-ideal care. These varieties offer a profusion of blooms roughly from the same period as echinaceas.
Rudy Mini Yellow Black is a compact, low-growing cultivar from 2022 with a very dense habit and abundant flowering. Its daisy-shaped blossoms are surprisingly large – measuring 8–10 cm across, with semi-double petals that are two-thirds dark brown, resembling bear fur (perhaps a nod to the common name “hairy”? 😊) and glowing golden-yellow tips. The flower centers are deep, rich brown like dark chocolate. Each flower lasts for an impressive two weeks or more, much like echinaceas. It begins to flower around mid-July and keeps going until the last sunny and warm days of autumn.
The foliage is narrowly oval, slightly hairy, in shades of light to mid green, and notably healthy. Stems are upright, well-branched, and reach a modest 40 cm height. Since this plant loves sun and near-to-dry conditions, it pairs beautifully with other prairie-style perennials and drought-tolerant companions. It creates a striking contrast with silvery foliage plants such as Helichrysum and Artemisia, low ornamental grasses like Festuca, and airy companions such as Gypsophila. It works beautifully as a low-growing foreground accent in front of Perovskia or compact cultivars of butterfly bush (Buddleja). It can also be used as a floral centerpiece among small shrubs and conifers, and of course, it looks stunning when planted in mass in containers on patios and balconies.
Last update 20-07-2025
Gloriosa daisy is best considered a short‑lived perennial or biennial which, in temperate climates, behaves much more like an annual and persists mainly through self‑seeding rather than the true longevity of the mother plants. It grows best in full sun and in well‑drained, light to medium soils that do not remain wet over winter, as waterlogging is more damaging to it than drought. Once established it tolerates short dry spells well, although extremely poor, sandy soils lead to weak growth and sparse flowering. It thrives in heat. It does not require fertilising, since excess nitrogen produces lush but soft growth and fewer flowers. Spent flower heads may be removed to prolong blooming, but some must be left to ripen seed, otherwise the planting will disappear within one or two seasons. Container growing is possible only for a short time, as the plants quickly exhaust the substrate and pots are prone to freezing in winter. In spring it is vulnerable to slugs, which can destroy all new leaves to the point that the plant weakens and dies. Its hardiness ranges from −29 to −34 °C (USDA zone 4-5).
