Origin
Rhipidoglossum bilobatum is an orchid species that originates from the tropical and subtropical regions of Africa. It can be found in countries such as Cameroon, Gabon, Nigeria, and the Democratic Republic of Congo.
Common Names
Commonly known as the "Double-lobed Rhipidoglossum" due to the unique shape of its lip, this plant is also referred to as the "Bilobed Rhipidoglossum".
Uses
Rhipidoglossum bilobatum is primarily cultivated for ornamental purposes due to its unique and attractive appearance. It is often used as a decorative plant in gardens, as well as being grown in greenhouses for commercial purposes.
General Appearance
This orchid species is characterized by its thick, fleshy, ovate leaves that grow up to 30cm in length. It produces a tall, upright inflorescence with a spike that can grow up to 60cm long. The flowers of Rhipidoglossum bilobatum are small and fragrant, measuring up to 2cm in diameter, and are typically white or cream in colour with purple markings on the lip. The lip of the flower is the most distinctive feature of this plant, being bilobed and resembling a small pair of butterfly wings.
Light Requirements
Rhipidoglossum bilobatum typically prefers bright but indirect sunlight. Sheer curtains or a partially shaded area outdoors can be ideal for this plant as it can be susceptible to sunburn if exposed to direct, harsh sunlight for extended periods.
Temperature Requirements
The ideal temperature range for Rhipidoglossum bilobatum is between 18-25°C (64-77°F). They can tolerate slightly cooler temperatures but must be kept away from drafts, which can cause stress and harm to the plant.
Soil Requirements
An orchid mix that includes small bark, sphagnum moss, and volcanic rock, or a commercial orchid mix, can be utilized as the soil for Rhipidoglossum bilobatum. A well-draining soil is necessary as they require good air circulation through their roots. Use a pot with drainage holes to prevent water from becoming stagnant and causing root rot.
Cultivation Methods for Rhipidoglossum bilobatum
Rhipidoglossum bilobatum is an epiphytic species that typically grows on trees. Therefore, it requires the right growing medium to thrive. Orchid soil mix, a combination of moss, perlite, and bark chips, is an ideal growing medium for this plant. Alternatively, you can make your mix by combining different materials such as burned charcoal, sphagnum moss, and pumice, depending on what is readily available.
Rhipidoglossum bilobatum prefers bright but filtered light, with a temperature range of 65 to 80 degrees Fahrenheit during the day and 55 to 60 degrees Fahrenheit at night. It thrives well in humidity levels of about 60 to 80%.
Watering Needs for Rhipidoglossum bilobatum
Rhipidoglossum bilobatum needs to be regularly watered as it is used to a moist environment. However, the watering frequency largely depends on the weather condition and time of the year. During the dry season, the orchid should be watered every five to seven days, while during the rainy season, you can extend the watering interval to every 10 to 14 days.
It is essential to note that water should be limited during winter as it can cause the plant roots to rot. Therefore, it is advisable to water only when the topsoil has dried out.
Fertilization for Rhipidoglossum bilobatum
Rhipidoglossum bilobatum requires fertilization to boost its growth and maintain its vibrancy. The plant requires regular feeding, especially during the growing season, which is from March to September. The best fertilizer to use includes an ammonium-based solution that has equal proportions of nitrogen, potassium, and phosphorous. Alternatively, a 20-20-20 fertilizer solution can be used at half strength and applied every other week.
When applying the fertilizer, avoid direct contact with the orchid leaves or stem, and ensure proper dilution before application. Too much fertilizer can burn the roots and harm the plant.
Pruning for Rhipidoglossum bilobatum
Rhipidoglossum bilobatum does not require frequent pruning as it does not produce a lot of foliage. However, it would help if you removed any dead or brown leaves that emerge from the base of the plant to allow for adequate air circulation. Additionally, any damaged roots or infested parts should also be cut off to prevent the spread of infections. Prune the plant using sterilized scissors or a sharp knife to minimize injury and prevent the spread of diseases.
Overall, Rhipidoglossum bilobatum is a low maintenance plant and requires simple care procedures to thrive.
Propagation of Rhipidoglossum bilobatum
There are two main methods of propagating Rhipidoglossum bilobatum: through division and through seed. Each method has its own advantages and disadvantages and may be more suitable depending on the grower's needs and resources.
Division
Division involves separating a mature plant into two or more sections and replanting them separately. This method is typically used with orchids that have several pseudobulbs, or bulb-like structures, as it allows for easier separation. In the case of Rhipidoglossum bilobatum, division can be performed after flowering but before new growth starts in the spring. Care must be taken to ensure each division has at least one pseudobulb and several roots.
Once the plant has been divided, each section can be planted in its own pot with fresh potting mix. The newly potted plants should be kept in a warm, humid environment to encourage new growth.
Seed
Seed propagation is a more complicated and time-consuming process than division but can yield a larger number of plants. In the case of Rhipidoglossum bilobatum, the plant produces small, dust-like seeds that are not visible to the naked eye. These seeds are typically sown onto a sterilized growing medium in a sterile container. The containers are then covered and placed in a warm, humid environment with indirect light.
After several weeks, the seeds should begin to germinate. The seedlings can be transplanted into individual pots once they have developed several leaves and roots. It is important to maintain a warm, humid environment for the seedlings until they are established.
Disease and Pest Management for Rhipidoglossum bilobatum (Summerh.) Szlach. & Olszewski
Rhipidoglossum bilobatum is a lovely orchid species that can be vulnerable to diseases and pests. However, with proper care and management, you can minimize or prevent the risks of their infestation. Here are some common diseases and pests that may impact R. bilobatum and how to deal with them:
Diseases
Leaf spot disease: Leaf spot disease is caused by a fungal or bacterial pathogen, and it can cause small dark spots to form on the leaves. To manage this disease, remove the affected leaves and avoid overhead watering. Ensure that there is adequate air circulation around the plant and avoid overcrowding.
Root rot: Root rot is a fungal disease that causes the roots to decay. Overwatering and poor drainage can increase the risk of this disease. To manage this, reduce watering frequency and ensure that the plant's roots have enough airflow by using a soilless growing medium, or by using pots with suitable drainage holes.
Viral diseases: Viral diseases can cause a range of symptoms like stunting, deformation, and yellowing of the leaves. There's no cure for viral diseases, and the best option is to remove the affected plant to prevent the spread of the infection.
Pests
Spider mites: Spider mites are tiny pests that suck the sap from the leaves, leading to leaf yellowing, wilting, and even death. To manage spider mites, use insecticidal soap, neem oil, or other eco-friendly pesticides. Make sure to apply the pesticide on both sides of the leaves.
Thrips: Thrips are slender, winged insects that can cause distorted and scarred leaves and flowers. To manage them, use sticky traps or apply insecticides that help control the pest population.
Snails and slugs: Snails and slugs can cause severe damage to the leaves by feeding on them. To manage these pests, manually remove them, or use slug and snail baits to reduce their population.
By being vigilant and promptly addressing any symptoms or signs of infestation, you can ensure that your Rhipidoglossum bilobatum plant remains healthy and thrives.
