Dendrobium Nora Tokunaga - A primary hybrid formed from two species, both belonging to the Latouria section and endemic to Papua New Guinea, presents a relatively similar appearance to Dendrobium Roy Tokunaga but with much more compact stems, at least in terms of size.
With a particular preference for a moderately warm climate, moderate lighting, and multiple annual bloomings, revealing flowers with impressive colors in white, green, and pink, Nora Tokunaga is perhaps one of the easiest representatives of the Dendrobium genus to grow and bloom indoors, making it recommended both for beginners starting an orchid collection and for experienced enthusiasts, who particularly appreciate the durable, resilient flowers that can be admired for several months (not weeks!!!) arranged on branched, multi-flowered stalks.
The flower-bearing stems, generally developed in previous years, are about 5 cm taller and have diameters twice as large as the younger ones. They develop branched floral stalks apically, on which large flowers open, approximately 7 cm wide, measured from the tip of the lateral petals, and 5 cm high, from the tip of the vertical tepal to the tip of the voluminous labellum, whose central lobe is narrower than the lateral petals and similar in length to the sepals. The laterally curved lobes are shorter than the lateral petals but significantly wider, rounded at the tips, with crenulated – wavy edges.
The overall coloration is white for the sepals and petals, with a more intense pink or purplish marbling dorsally, which is also partially visible through the transparency of the petals on the ventral side. The color pattern of the sepals consists of remarkable dots or spots over 1 mm in diameter, which can merge into longitudinal rows, while the lateral petals feature a visibly fused central band. The central lobe of the labellum is similarly colored to the sepals, showing the same spotting dorsally, and the lateral lobes display a consistent ventral striping with a radial arrangement from the center toward the marginal area, where it does not merge with the pale violet ventral and intense violet dorsal marginal band. The flowers, numbering 1 – 5 per flower spike, bloom separately, relatively sequentially, multiple times on the same spike, providing a remarkable and long-lasting color spectacle. Some growers report the presence of a fragrance, while others claim a complete lack of it.
With exceptional tolerance to temperature values, Dendrobium Nora Tokunaga stands out as a relatively easy-to-grow specimen that does not pose problems for enthusiasts. Nora Tokunaga is a hybrid created by Roy Tokunaga, one of the two renowned experts of the Hawaiian greenhouses H&R Nurseries INC, and is dedicated to his wife, Nora.
High tolerance to variations in the growing environment is also noted regarding the substrate, as there are reports of growth and re-flowering of this hybrid even in hydroponic systems, although classic systems in pots with substrates such as pine bark, volcanic tuff, perlite, expanded ceramic balls, charcoal, and pumice stone are generally preferred. Unlike other species or hybrids belonging to the Dendrobium genus, Nora Tokunaga prefers moderate lighting and weekly fertilization at dilutions of 25 – 50% of the recommended dose. It is not mandatory to provide a rest period to achieve re-flowering, as this wonderful Dendrobium will bloom both under constant growth conditions and when the watering frequency is reduced to intervals of two weeks.
The recommended light radiation level should be within the range of 20,000 – 30,000 lux, with plant flowering possible even under conditions of growth exclusively under broad-spectrum artificial lights.
Growth temperatures belong to the moderate-warm range, between 24–28 °C during the day and 20–22 °C for nighttime temperatures.
Regarding relative air humidity, the ideal value will range between 70–80%.
The growing medium, as briefly mentioned earlier, will consist of pine bark, coconut fiber pieces, or other hard, woody substrates, provided a high humidity level is maintained, ensuring daily watering when mounted on bark plaques. If choosing to grow specimens in pots, opt for the smallest possible sizes, preferring ceramic containers over plastic ones. A necessary requirement for selecting a suitable substrate is ensuring minimal compaction and maximum aeration of the growing medium. Substrate changes, container replacements, or divisions can be made whenever new root development is observed.
Irrigations will be abundant throughout the year, varying according to the season, light intensity, and temperature values, which affect the plants' growth rate and thus the water assimilation rate. The substrate should remain consistently moist, but not wet, and water stagnation in containers should be avoided.
Fertilizations will be carried out weekly or biweekly, at concentrations of 25–50% of the recommended dose in the usage instructions, using a balanced fertilizer suitable for the entire year.
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