Origin and Common Names
Oxalis depressa Eckl. & Zeyh. is a member of the Oxalidaceae family and is commonly known as Cape sorrel or Soursob in South Africa. It is an indigenous plant to South Africa, specifically, it is found in the Western Cape Province, Eastern Cape Province, KwaZulu-Natal province. It can be found growing in grassland and rocky outcrops.General Appearance
Oxalis depressa is a low-growing, herbaceous perennial plant that can grow up to 30 cm in height. It has a succulent stem, which is often reddish in color, and palmately divided leaves, with each leaflet being obcordate in shape. The plant produces small, bright yellow flowers on a stalk that arises from the stem. The flowers have five petals and bloom from August to March.Uses
The plant has various uses, including medicinal and culinary purposes. In traditional medicine, the leaves of Oxalis depressa are used for the treatment of infections, colds, and fever. The plant is also considered to be a good source of vitamin C. In culinary applications, the leaves are used as an ingredient in salads for their tangy flavor. The leaves are also used to flavor soups and stews, and the stems and roots can be used to make a refreshing lemonade-like drink. Overall, Oxalis depressa is a versatile and valuable plant that has both medicinal and culinary benefits. Its low growing nature and attractive appearance make it a great addition to any garden or landscape.Light Requirements
The plant Oxalis depressa Eckl. & Zeyh. requires a moderate amount of sunlight to grow. It should ideally be grown in a spot that receives partial shade or filtered sunlight. Direct exposure to sunlight for long periods can cause the leaves to burn and wilt.
Temperature Requirements
The plant is indigenous to South Africa, where the climate is mostly warm. It thrives in temperatures between 15°C to 30°C (60°F to 86°F), but can tolerate temperatures below 10°C (50°F) without any damage.
Soil Requirements
The ideal soil mix for Oxalis depressa Eckl. & Zeyh. is well-draining, fertile, and slightly acidic. The pH level of the soil should be between 5.5 and 6.5. Sandy or loamy soil is perfect for this plant. It does not tolerate heavy clay soil or waterlogged soil, which can cause root rot.
Cultivation
The Oxalis depressa Eckl. & Zeyh. is native to South Africa and requires a warm and humid climate. If you live in a colder climate, it is best to cultivate this plant indoors. Grow it in a pot or a hanging basket to showcase its beauty. This plant requires well-draining soil that is rich in organic matter.
Watering Needs
This plant prefers soil that is moist but not waterlogged. Keep the soil evenly moist but make sure not to overwater it. Overwatering may cause the roots to rot. During the growing season, you may water the plant thoroughly once a week. Reduce watering during the dormant season.
Fertilization
Feed this plant once every month during the growing season. Use a balanced, water-soluble fertilizer that is rich in nitrogen, potassium, and phosphorus. Be careful not to over-fertilize, which can cause the plant to produce fewer flowers and more foliage.
Pruning
Prune this plant back after it has finished blooming to encourage bushier growth. Use sharp and clean cutting tools to avoid damaging the plant. Remove any damaged, diseased, or dead leaves to promote healthy foliage growth and prevent the spread of diseases.
Propagation of Oxalis depressa Eckl. & Zeyh.
Oxalis depressa Eckl. & Zeyh., commonly known as South African wood sorrel, is a low-growing plant that produces yellow flowers and triangular-shaped leaves. Propagation of this plant can be accomplished through various methods, including division, rhizome cuttings, and seed.
Division
One of the easiest ways to propagate Oxalis depressa is through division. This should be done in the spring or early summer when the plant is actively growing. To divide the plant, gently dig up the root system and separate the clumps into smaller sections with a sharp knife or garden shears. Each section should have a healthy root system and at least one shoot or leaf set. These can then be replanted in a well-draining soil mix and watered thoroughly.
Rhizome Cuttings
Rhizome cuttings are another method of propagating Oxalis depressa. This involves taking a section of the underground stem, or rhizome, and planting it in a new location. To do this, carefully dig up a section of the rhizome and cut it into pieces that are at least 2 inches long. Each piece should have a healthy root system and several leaf sets. These can then be planted in a well-draining soil mix and watered thoroughly.
Seed
Lastly, Oxalis depressa can also be propagated from seed. This method requires a bit more patience and attention to detail, as the seeds require specific conditions to germinate. Collect seeds from mature plants in the fall and plant them in a seed tray or small pot filled with a well-draining soil mix. Cover the seeds with a light layer of soil and keep moist. Germination can take several weeks, but once the seedlings are well-established, they can be transplanted to a larger container or outside into the garden.
Disease and Pest Management of Oxalis depressa Eckl. & Zeyh.
Oxalis depressa Eckl. & Zeyh., commonly known as the Cape wood sorrel, is a beautiful, low-growing plant with delicate, clover-like leaves that produces bright yellow flowers. While it is generally a hardy species, certain diseases and pests can affect its growth and health. To ensure the proper care of the plant, it is important to know about common diseases and pests that might affect it and ways to manage them effectively.
Common Diseases of Oxalis depressa Eckl. & Zeyh. and their Management
Fungal diseases: The Cape wood sorrel is susceptible to various fungal diseases such as powdery mildew, leaf spot, and rust, which can cause yellowing, wilting, and defoliation of the plant. To manage fungal diseases, it is essential to keep the plant's foliage dry, provide adequate ventilation, and remove any infected plants or debris immediately. Applying fungicides and practicing crop rotation can also be effective in preventing these diseases.
Bacterial diseases: Bacterial diseases such as bacterial blight can also affect the Cape wood sorrel, causing the leaves to develop brown spots and eventually leading to plant death. These diseases can be managed by removing any infected plant parts immediately, practicing proper watering and fertilization, and using bactericides.
Viral diseases: Viral diseases such as mosaic virus can cause yellow mottling and distortion of the plant's leaves, stunting of growth, and reduced flowering. Unfortunately, there is no cure for viral diseases, and infected plants must be removed and destroyed to prevent the spread of the virus to other plants in the area.
Common Pests of Oxalis depressa Eckl. & Zeyh. and their Management
Thrips: Thrips are tiny insects that can cause extensive damage to the Cape wood sorrel by sucking out the plant sap, causing distorted and discolored leaves, and reduced flowering. To manage thrips, it is recommended to use insecticidal soaps or horticultural oils and clean the plant frequently.
Slugs and snails: These creatures can cause extensive damage to the plant by feeding on the leaves and stems, leaving behind slime trails. To manage slugs and snails, it is necessary to eliminate hiding places, such as debris and tall grass, and use slug baits, copper tape, and barriers.
Aphids: Aphids are sap-sucking insects that can cause yellowing, curling, and wilting of the plant's leaves by transmitting viruses and excreting honeydew. To manage aphids, it is recommended to use insecticidal soaps or horticultural oils, prune and dispose of any infected plant parts, and encourage natural predators.
In summary, the Cape wood sorrel is a beautiful and robust plant that can be vulnerable to certain diseases and pests. Understanding the common diseases and pests that affect this plant and implementing effective management strategies can help ensure its long-term health and survival.
