General Appearance
Calamagrostis Welwitschii Rendle is a perennial grass that belongs to the Poaceae family. The plant is tall and can grow to a height of 200 cm with a dense and bushy appearance. It has narrow leaves that are silvery-grey in color and can reach up to 60 cm in length. The leaves have sharp edges with a pointed tip and grow from the base of the stem.
Origin and Common Names
The plant is commonly known as Welwitsch's reed grass and is native to Africa, particularly Angola and Zambia. The grass was first discovered by botanist Friedrich Welwitsch in Angola in 1859. The specific epithet is named after the botanist. It is also commonly referred to as Feather reed grass.
Uses
Calamagrostis Welwitschii Rendle is a drought-resistant grass and is commonly used as an ornamental plant in gardens and landscaping. The grass is also used for erosion control due to its extensive root structure. In addition, the plant has been used traditionally for medicinal purposes. The leaves and roots have been used to treat various ailments such as stomach pains, fever, and internal bleeding.
Light Requirements
The Calamagrostis welwitschii Rendle requires full sunlight exposure. It is essential for the proper growth and development of the plant. The plant should receive six to eight hours of direct sunlight every day. It is also important to ensure that the plant is not shaded by other trees or plants as it can hamper its growth.
Temperature Requirements
The ideal temperature for the growth of Calamagrostis welwitschii Rendle is between 20°C to 35°C. It can tolerate a temperature range of 10°C to 40°C. However, it is essential to ensure that the plant is protected from frost as it can damage the plant's foliage.
Soil Requirements
The soil should be well-draining and rich in nutrients for the proper growth of Calamagrostis welwitschii Rendle. The pH level of the soil should be between 5.0 to 7.0. The plant prefers sandy or loamy soil with adequate moisture content. It is also essential to ensure that the soil is not waterlogged, as it can rot the plant's roots.
Cultivation Methods:
The Calamagrostis welwitschii Rendle is a perennial ornamental grass species native to Angola that thrives in well-draining soil and full sun to partial shade. It is best propagated through division or by seed. Seeds should be sown in a well-prepared seedbed and kept moist until emergence.
Watering Needs:
The Calamagrostis welwitschii Rendle requires frequent watering during its establishment period, but mature plants are relatively drought-tolerant. However, it is essential to avoid overwatering as this may lead to root rot and other related diseases.
Fertilization:
The Calamagrostis welwitschii Rendle does not require much fertilization but can benefit from occasional feedings of high-nitrogen fertilizer. Fertilization should be done during the growing season.
Pruning:
The Calamagrostis welwitschii Rendle does not require regular pruning but can be cut back in late winter or early spring to stimulate new growth. It is also advisable to remove any dead or diseased foliage throughout the growing season to prevent the spread of diseases.
Propagation methods of Calamagrostis welwitschii Rendle
Calamagrostis welwitschii Rendle can be propagated by seeds and division.
Propagation by seeds
The seeds of Calamagrostis welwitschii Rendle can be sown in pots filled with well-draining soil mix. The seeds should be scattered on the soil surface and pressed gently. Cover the seeds with a thin layer of soil and water it gently. Place the pot in a warm, bright location and keep the soil moist. Germination usually takes two to three weeks.
Propagation by division
The ideal time for division is during the spring when new growth emerges. To propagate through division, carefully dig out the mature clump, taking care not to damage the roots. Shake off excess soil and divide the clump into smaller sections using a sharp knife. Each division should have several stems and adequate roots. Replant the divisions in a well-prepared bed with good drainage.
Disease Management
Calamagrostis welwitschii Rendle is generally resistant to most common plant diseases. However, it can still be affected by fungal diseases like leaf spots, rust, and smut. It is important to keep the plant dry and ensure adequate air circulation to prevent the growth and spread of fungal diseases.
If fungal diseases are present, they can be managed by removing and destroying infected plant material, maintaining proper watering practices, and applying fungicides as directed.
Pest Management
Common pests that might affect Calamagrostis welwitschii Rendle include aphids, spider mites, and grasshoppers. These pests can cause damage by feeding on the plant's leaves and stems.
To manage aphids and spider mites, the use of insecticidal soaps or neem oil can be effective. Grasshoppers can be managed by using physical barriers or applying pesticides.
Implementing good cultural practices, such as maintaining a clean growing area, removing plant debris, and ensuring adequate irrigation, can also help prevent pest infestations.
