Origin
Disa bivalvata (L.f.) T.Durand & Schinz x D. atricapilla (Harv. ex Lindl.) Bolus is a hybrid orchid species that was developed through cross-breeding between Disa bivalvata and Disa atricapilla. The parent plants are native to Southern Africa, particularly in the Cape Province region.
Common Names
The plant is commonly known as the Two-valve Disa or Black-haired Disa.
Uses
Disa bivalvata (L.f.) T.Durand & Schinz x D. atricapilla (Harv. ex Lindl.) Bolus is often cultivated as an ornamental plant due to its unique appearance and exquisite beauty. It is a popular species among collectors of orchids and is often grown in greenhouses or specialized nurseries.
General Appearance
The Disa bivalvata (L.f.) T.Durand & Schinz x D. atricapilla (Harv. ex Lindl.) Bolus has a compact and erect growth habit, reaching a height of up to 30 cm. The leaves are fleshy, linear, and reach a length of up to 8 cm. The flowers are highly distinctive, featuring a deep red or maroon coloring with contrasting yellow spots, and a prominent black disc-like center. They bloom in winter and early spring, and their striking appearance and pleasing scent attract a variety of pollinators, including bees, butterflies, and flies.
Light Conditions
Disa bivalvata x D. atricapilla requires bright, indirect light to thrive. They should be placed in a location that receives partial shade during the day, especially during the warmer months, as direct sunlight can scorch the plant and cause it to wilt. These orchids prefer a location with filtered light, such as under a tree or on a shaded windowsill.
Temperature Requirements
Disa bivalvata x D. atricapilla grows best in temperatures that range from 50°F to 80°F (10°C to 27°C). They can tolerate cooler conditions but are not frost-tolerant. During the winter months, it is best to keep the plant between 50°F to 60°F (10°C to 15.6°C) to ensure that it goes through its dormant phase and prepares to flower in the spring.
Soil and Water Requirements
This orchid species prefers a well-draining soil that is nutrient-rich and moist but not waterlogged. A successful potting medium contains a mixture of bark chips, sphagnum moss, and perlite. The plant should be watered when the top layer of the soil is dry to the touch. Be sure that the water drains adequately to avoid root rot. Misting the orchid periodically is also necessary to ensure they have enough humidity and have well-established roots system, allowing the plant to take in moisture more efficiently.
Fertilizer Requirements
Disa bivalvata x D. atricapilla requires regular feeding to support its growth and promote flowering. A balanced fertilizer should be used every two weeks during the growing season, usually between late spring and early fall, with a phosphorus-rich formula when in bloom. Feeding orchids during the dormant season is not necessary.
Cultivation Methods
Disa bivalvata x D. atricapilla is a terrestrial orchid that requires a well-draining planting mix to thrive. It is recommended to use a blend of bark, perlite, and peat moss in equal parts. The plant thrives in bright, indirect sunlight and should be placed in a spot where it can receive some shade during the hottest part of the day. The ideal temperature range for Disa bivalvata x D. atricapilla is between 60-80°F (15-27°C).
Watering Needs
The watering needs of Disa bivalvata x D. atricapilla vary depending on the season and environmental conditions. During the growing season, the plant prefers to be kept moist but not waterlogged. It is recommended to water the plant once a week and check the moisture level of the soil regularly. In winter, the frequency of watering should be reduced, and the plant should be allowed to dry out between watering sessions.
Fertilization
Disa bivalvata x D. atricapilla requires regular fertilization to promote healthy growth and abundant blooming. It is recommended to use a balanced fertilizer with equal amounts of nitrogen, phosphorus, and potassium. During the growing season, fertilize the plant once a month. Be careful not to over-fertilize as it can cause damage to the plant.
Pruning
Disa bivalvata x D. atricapilla requires minimal pruning. Remove any dead or yellowing leaves by snipping them off at the base with a clean, sharp pair of scissors. After the blooming season, cut back the flower spikes at the base to promote more vigorous growth in the following season. Avoid damaging the roots while pruning the plant.
Propagating Disa bivalvata x D. atricapilla
Disa bivalvata x D. atricapilla is a beautiful hybrid plant that is relatively easy to propagate. The plant propagation methods used will depend on the grower’s preferences, and available resources. The following methods are suitable for propagating Disa bivalvata x D. atricapilla:
Division
Division is an excellent way to propagate Disa bivalvata x D. atricapilla. It involves separating the clumps of the Disa bivalvata x D. atricapilla hybrid plant into smaller sections and replanting them in new containers or garden beds. The best time for division is in the late winter or early spring when the plant is dormant. It is essential to ensure that each new section has healthy roots and leaves before planting.
Seeds
Another way to propagate Disa bivalvata x D. atricapilla is through seeds. It is essential to ensure that the seeds are healthy and have not been contaminated. The plants produce seeds in pods that mature during late summer and early autumn. After harvesting the seeds, keep them in a dry and cool place before planting them. Plant the seeds in well-draining soil and keep them in a warm place with adequate sunlight. If successful, the seeds will germinate after four to six weeks.
Root Cuttings
Root cuttings are another method for propagating Disa bivalvata x D. atricapilla. Take healthy root cuttings approximately 3-4 cm long and plant them in a well-draining soil mix. Keep the soil moist and the temperature warm with adequate sunlight. After a few weeks, the roots will begin to develop and grow new plantlets.
Conclusion
Disa bivalvata x D. atricapilla is an excellent plant hybrid that can be propagated by division, seeds or root cuttings. Each propagation method has its advantages, and the grower should choose the method they are comfortable with and have the resources to carry out. Always ensure that the plant is healthy before propagating, as this will increase the chances of success.
Disease and Pest Management for Disa bivalvata x D. atricapilla
Disa bivalvata x D. atricapilla is a beautiful orchid hybrid that requires some careful management to keep it healthy. Staying on top of diseases and pests is essential to ensuring that this plant thrives. Here are some of the most common problems that can affect Disa bivalvata x D. atricapilla and what you can do about them.
Common Diseases
One of the biggest threats to Disa bivalvata x D. atricapilla is fungal infection. This plant is susceptible to a variety of fungal diseases, such as botrytis and powdery mildew. To manage these diseases, make sure that your plant is not overcrowded or overwatered. Good airflow is essential to preventing fungal growth, so make sure your plants are spaced appropriately and have enough ventilation. You can also apply fungicides preventatively, but make sure to follow the instructions carefully to avoid damaging your plants.
Common Pests
Another problem that can affect Disa bivalvata x D. atricapilla is infestations of pests. Common pests that can affect this plant include spider mites and thrips. To manage these pests, you can use an insecticidal soap or oil spray. Make sure to apply these products thoroughly, getting into all the nooks and crannies where pests could be hiding. You can also use sticky traps to catch flying pests like thrips before they can lay their eggs.
Prevention Tips
Preventing problems before they occur is always the best approach to managing diseases and pests. Keep your Disa bivalvata x D. atricapilla healthy and vigorous by making sure it gets enough light, water, and nutrients. Avoid overwatering, which can lead to root rot, and make sure that your plant is not getting too much direct sunlight, which can scorch the leaves. Regularly inspect your plant for signs of disease or pest infestation so that you can catch any problems early on and take action before they get out of hand.
By staying on top of diseases and pests, you can ensure that your Disa bivalvata x D. atricapilla stays healthy and beautiful all year round. With a little effort and attention, you can enjoy this stunning orchid hybrid for years to come.
