Introduction
Nervilia bollei (Rchb.f.) Schltr., commonly known as Nervilia, is a terrestrial orchid species originating from Southeast Asia.
Common Names
Aside from Nervilia, this plant is also commonly known as the Green Veined Nervilia or Veinless Nervilia.
Appearance
The Nervilia plant has a fleshy and tuberous rhizome with thin and elongated roots growing from it. The stem is short and flattened, usually bearing two leaves. The leaves are broad, slightly rounded, with prominent veins, and can grow up to 14 cm in width. A single inflorescence emerges from the center of the leaves and can grow up to 20 cm in height. The flowers are small and sparse, measuring only about 1 cm in diameter, and are clustered at the tip of the inflorescence. The petals and sepals are generally greenish with reddish veins, while the lip is white or greenish-yellow.
Uses
Nervilia bollei has some traditional medicinal uses. The tubers are believed to have antipyretic properties and are used to treat fever and other ailments. In some regions, the plant is also used as an herbal remedy for snake bites. Additionally, the plant has ornamental value and is cultivated in some countries as a houseplant or in gardens.
Light Requirements
Nervilia bollei (Rchb.f.) Schltr. prefers to grow in partial to full shade. Direct sunlight may burn its delicate leaves and can result in stunted growth. It is advisable to grow the plant under a shaded area or under a tree canopy that provides enough shade to regulate the amount of sunlight it receives.
Temperature Requirements
The ideal temperature range for Nervilia bollei (Rchb.f.) Schltr. is 18°C to 25°C. It can tolerate slightly colder or warmer temperatures but only for a short period. The plant requires a stable temperature regime to survive and grow correctly. The temperature affects the flowering period, and any temperature fluctuations can affect its blooming time.
Soil Requirements
Nervilia bollei (Rchb.f.) Schltr. requires well-drained soil. The soil should have a low pH of 5.5 to 6.5 to ensure healthy growth. The soil should also be somewhat rich in organic matter and have a moist texture. The plant can grow in rocky and sandy soils as long as it's well-drained and acidic enough.
Cultivation methods
Nervilia bollei is a terrestrial orchid and can be cultivated both indoors and outdoors. Before planting, choose a well-draining potting mix with a pH of around 6. The plant prefers warm and humid conditions, and it can be propagated from seeds or through division.
Watering needs
Proper watering is crucial for the healthy growth of Nervilia bollei. Water the plant regularly during the growing season, making sure the soil remains moist but not waterlogged. Reduce the frequency of watering during the dormant season, but make sure the soil doesn't become completely dry.
Fertilization
Nervilia bollei can benefit from regular fertilization during the growing season. Use a balanced fertilizer with an N-P-K ratio of 20-20-20 or 10-10-10, applied every two weeks. Reduce the frequency of fertilization during the dormant season. Avoid over-fertilizing, which can lead to burnt roots and leaves.
Pruning
Nervilia bollei doesn't require any special pruning techniques. Remove any dead or yellowing leaves as needed to prevent fungal disease. If the plant has outgrown its pot, it's time to repot and divide it. Make sure to sanitize your tools before using them to reduce the risk of spreading disease.
Propagation of Nervilia bollei (Rchb.f.) Schltr.
Nervilia bollei (Rchb.f.) Schltr. is a terrestrial, orchid species that belongs to the family Orchidaceae. It is commonly known as the 'rattail orchid' because of its long, inflorescence resembling a rat's tail. The plant is native to southern Africa and Madagascar.
Propagation methods
Nervilia bollei plants can be propagated by both seed and vegetative methods.
Seed propagation
The plant produces fine dust-like seeds that require specific conditions for germination. Seeds need to be sown as soon as they are ripe in a well-draining medium. The medium should be kept moist but not saturated with water to ensure the seeds have adequate water for germination.
Seeds are very sensitive to light and require bright, indirect lighting to germinate. Placing a thin layer of moss over the seeds will keep them safe in the growth medium. It typically takes 2-3 weeks for the seeds to germinate, and the appearance of the first seedlings will take about 6 months to appear. Seedlings must be kept in a high-humidity environment after transplanting to prevent moisture loss.
Vegetative propagation
Vegetative propagation of Nervilia bollei is mainly done through division of the pseudobulb which is present at the top of the root. The process involves gently separating the pseudobulbs which can be later replanted in individual pots.
The pseudobulbs can be divided in any season of the year except in the flowering season. It is advisable to divide them during the growing season to allow enough time for new roots to develop. The newly divided plants should be watered thoroughly and moved to the shade to protect them from direct sunlight.
The plant can also be propagated through leaf cuttings, which can be tricky but worth the effort. Cuttings should be taken near the base of the plant, then planted in a well-draining medium, keeping it moist but not too wet. Using hormone rooting powder can encourage rooting. The cuttings should be kept in a humid environment to promote root growth.
Overall, propagating Nervilia bollei can be a rewarding experience and will increase the number of plants in your collection. Proper care, patience, and attention to detail are essential to ensure propagation success.
Disease Management
There are a few common diseases that can affect Nervilia bollei. The most common ones are fungal diseases such as root rot and leaf spot. To manage and prevent fungal diseases, it is essential to ensure proper growing conditions such as adequate sunlight, ventilation, and soil drainage. It is also essential to avoid overcrowding the plants and to remove any infected plant parts immediately. A preventative fungicide treatment can also be used.
Pest Management
The most common pests that affect Nervilia bollei are mites and mealybugs. To manage and prevent infestations, it is necessary to keep the plants clean and free from debris. Regular inspection should be done to ensure early detection and to remove any visible pests immediately. Insecticidal soap or horticultural oils can be used to treat infestations. It is also vital to maintain proper growing conditions to keep the plant healthy and less attractive to pests.
