Dendrobium gregulus occurs endemically in western and northern Thailand. They grows usually on branches of trees in rare, deciduous mountain forests, at heights of 1100-1250 m.
Dendrobium gregulus, also called as The Crowded Dendrobium (refers to the closely spaced pseudobulbs), Aporum heterocaulon, Dendrobium heterocaulon, is a species of the genus Dendrobium. This species was described by Gunnar Seidenfaden in 1985.
IDENTIFY DENDROBIUM GREGULUS
Dendrobium gregulus occurs endemically in western and northern Thailand. They grows usually on branches of trees in rare, deciduous mountain forests, at heights of 1100-1250 m.
It is a miniature sized, cool growing epiphyte, which reaching a height of 4-7 cm, with densly clustered, tiny, round, 1 cm long pseudobulbs enveloped by onion-like sheaths and carrying several deciduous at flowering leaves.
The Crowded Dendrobium blooms in the winter on a 1.2 to 2.4" (3 to 6 cm) long, 4 to 6 flowered inflorescence arising from the apex of leafless stems. The flowers are 1.5 cm in diameter. The flakes of both whorls are light sulfur yellow. The inner whorl flakes are simple. The ridge has no clear side plots, is curved, wavy along the edges and has a wide, dark yellow thickening at the apex. On the sides at the base it has red and purple veining.
DENDROBIUM GREGULUS CARE AND CULTURE
Cultural information should only be used as a guide, and should be to be adapted to suit you. Your physical location; where you grow your plants, how much time you have to devote to their care, and many other factors, will need to be taken into account. Only then can you decide on the cultural methods that best suit you and your plants.
Light:
Dendrobium gregulus needs a light level of 30000-40000 lux. The plants should be shaded from the end of spring to autumn, but in winter the shading should be reduced or removed to ensure the highest possible light level, so as not to cause scalding of the leaves.
Temperature:
The average temperature of the summer day is 25-26 ° C, the night 18-19 ° C, and the daily difference is 7-8 ° C. In spring, the average day temperature is 29-32 ° C, the night 13-19 ° C, and the daily difference is 10-18 ° C. The average temperature of the winter day is 25-28 ° C, the night 9-10 ° C, and the daily difference is 14-20 ° C.
Humidity:
In the summer and early autumn, The Crowded Dendrobium needs the average humidity of 80-85%, but at the end of winter and at the beginning of spring it drops to almost 55%. The strong air movement throughout the year is very important.
Substrate, growing media and repotting:
Dendrobium gregulus can be grown on tree rootstocks or cork, high humidity is ensured and watering is done at least once a day in summer. If they are grown in pots, it is necessary to provide any loose, quickly drying substrate. Repotting is best done at the beginning of spring, when new roots begin to grow.
Watering:
From late spring until early autumn, the precipitation is moderate to heavy. During the growing season, Dendrobium gregulus should be constantly moist, but when in the autumn new increments reach maturity, the amount of water should be gradually reduced.
Fertilizer:
It is recommended to apply a 1/4-1/2 dose of orchid fertilizer weekly. From spring to mid-summer should be used fertilizer enriched with nitrogen, and then until the end of autumn fertilizer enriched with phosphorus.
Rest period:
During most of the winter season, Dendrobium gregulus should dry out between waterings, but they can not stay dry for too long. However, in the period of 1-2 months at the end of winter, the plants should be dry, only occasional morning fogging is allowed to prevent the plants from drying completely. During the period of drought fertilization should be eliminated.
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