Overview
Oxalis flava L. var. trifoliata E.Mey. is a perennial plant from the Oxalidaceae family. It is known for its delicate yellow flowers and clover-like leaves, which have a lemony flavor.
Origin and Common Names
Oxalis flava L. var. trifoliata E.Mey. is native to South Africa and is commonly known as the Cape sorrel or the lemon-scented oxalis. In Afrikaans, it is called suring.
Appearance
The plant usually grows up to 12 inches tall and has a spread of 8-10 inches. The leaves are trifoliate and strongly reminiscent of clover, with a fresh lemony aroma. Each leaflet is roughly obcordate, with a darker green upper surface and a lighter under-surface bearing a pair of small stipules at the base. The delicate yellow flowers are borne in umbels of 3-10 and bloom from late winter to early summer.
Uses
The leaves of Oxalis flava L. var. trifoliata E.Mey. are edible and add a tart, citrusy flavor to salads. The plant is also used in traditional medicine to treat various ailments, including jaundice, cough, and fever. Additionally, the plant is used as an ornamental plant and can be grown as a houseplant or in rock gardens.
Light Requirement
Oxalis flava L. var. trifoliata E.Mey. thrives in full sun to partial shade. It requires at least 6 hours of bright light, but high temperatures and intense sunlight can cause leaf scorching.
Temperature Requirement
This plant is native to South Africa, a tropical region with warm temperatures. It prefers a temperature range of 18-28°C (64-82°F). Low temperatures below 10°C (50°F) can cause it to enter dormancy.
Soil Requirement
Oxalis flava L. var. trifoliata E.Mey. prefers well-draining soils that are rich in humus. The soil pH should be slightly acidic to neutral, with a pH range between 5.5 and 7.0. The addition of organic matter such as compost, leaf mold, or well-rotted manure can greatly improve soil quality and drainage.
Cultivation of Oxalis flava L. var. trifoliata E.Mey.
Oxalis flava L. var. trifoliata E.Mey. is a hardy plant that can withstand a range of growing conditions. It prefers well-draining soil that is rich in organic matter. The plant should be planted in a location that receives partial sunlight to full sunlight. It can also tolerate partial shade.
The plant is best propagated through division. This should be done in early spring when new growth appears. The plant can also be propagated through seeds.
Watering Needs of Oxalis flava L. var. trifoliata E.Mey.
Oxalis flava L. var. trifoliata E.Mey. prefers moist but well-drained soil. It should be watered regularly, especially during its growing season. During periods of drought, it may require more frequent watering.
Over-watering the plant can be harmful and may cause root rot. It is recommended to water the plant at the base and not from the top.
Fertilization of Oxalis flava L. var. trifoliata E.Mey.
The plant benefits from the application of organic fertilizer during its growing season. This helps to promote healthy growth and flowering. It is recommended to fertilize the plant every month using an organic all-purpose fertilizer.
It is important not to over-fertilize the plant as this can lead to excessive foliage growth and reduced flower production.
Pruning of Oxalis flava L. var. trifoliata E.Mey.
Deadheading the plant is recommended to promote continuous flowering and prevent the development of seed. This should be done by removing the spent flowers from the plant.
The plant should also be pruned occasionally to remove any dead or damaged foliage. Pruning can be done at any time of the year, but it is recommended to avoid heavy pruning during its growing season as this can reduce flowering.
Overall, the cultivation and care of Oxalis flava L. var. trifoliata E.Mey. is relatively easy. The plant is hardy and adaptable to a range of growing conditions. With proper care, it can produce beautiful flowers and foliage throughout the growing season.
Propagation Methods for Oxalis flava L. var. trifoliata E.Mey.
Oxalis flava L. var. trifoliata E.Mey. is a beautiful and resilient plant that can be propagated in different ways. Some common propagation methods for this plant include:
Seeds
One of the easiest ways to propagate Oxalis flava L. var. trifoliata E.Mey. is through seeds. The plant produces small seeds that can be collected from the seedpods. The seeds should be sown in a well-draining potting mix and covered with a light layer of soil. Keep the soil moist, but not wet, and place the pot in a warm, brightly lit area. The seeds should germinate in 1-2 weeks.
Division
Oxalis flava L. var. trifoliata E.Mey. can also be propagated by division. Carefully lift the plant from its container in early spring and gently separate the clumps into smaller sections. Each section should have its own roots. Repot each section in a well-draining potting mix and water carefully until new growth appears.
Cuttings
Another way to propagate Oxalis flava L. var. trifoliata E.Mey. is through stem cuttings. Take stem cuttings from the plant in spring or summer, making sure each cutting has a few leaves and a stem section at least 2 inches long. Dip the cut ends in rooting hormone and plant the cuttings in a well-draining potting mix. Keep the soil moist and place the pot in a bright, warm location. Rooting should occur in 2-3 weeks.
These propagation methods are simple and effective, and can help you to create new plants to enjoy or share with others.
Disease and Pest Management of Oxalis flava L. var. trifoliata E.Mey.
Oxalis flava L. var. trifoliata E.Mey. is generally a hardy plant species that is not prone to many diseases and pests. However, some common problems that may affect the plant include:
Diseases
Crown rot: The infection caused by the Phytophthora fungus causes the plant to wilt and die. Overwatering and poor drainage can create conditions favorable for this disease.
Rust: Rust is a fungal disease that manifests with small rust-colored pustules or spots on the underside of the affected leaves. It can spread throughout the plant, causing leaf drop and reducing plant vigor, making it vulnerable to other pathogens.
Pests
Aphids: These tiny insects are common pests that attack the plant, sucking sap from tender new growth. They can cause the plant to become stunted and distorted. Their presence can also leave behind honeydew, which tends to attract other pests and fungi.
Spider mites: Spider mites are also a common pest that attacks the plant. They are red, brown, or yellow in color and suck sap from the plant, causing leaf discoloration, webbing, and eventual leaf drop.
Management
Disease management: To prevent crown rot, avoid overwatering and ensure proper drainage. Also, avoid planting the plant in heavy, poorly drained soils. For rust, affected leaves should be removed and destroyed immediately to avoid the spread of spores to other parts of the plant. Additionally, promoting good air circulation around the plant and avoiding overhead watering can help prevent the disease.
Pest management: For aphids, natural predators such as ladybugs and lacewings can be introduced or using insecticidal soap can also help to control their population. Introducing predatory mites can manage spider mite infestations. Also, practicing good plant hygiene, such as removing diseased and dead plant material, can prevent the buildup of unfavorable conditions for pests and diseases.
Early detection and prompt intervention are key to manage diseases and pests in Oxalis flava L. var. trifoliata E.Mey. By following a proactive approach to maintaining plant health, the plant can thrive, bloom, and remain productive.
