Overview
Oxalis eckloniana C.Presl var. robusta T.M.Salter is a plant species that belongs to the Oxalidaceae family. It is native to South Africa, and it is commonly grown as an ornamental plant due to its beautiful foliage and bright flowers. The plant is known by several common names, including Iron Cross, Giant Iron Cross, and Peppermint Rock Oxalis.
Appearance
Oxalis eckloniana C.Presl var. robusta T.M.Salter grows up to 12 inches tall and spreads up to 18 inches wide. It has a clumping habit and forms mats of rich green foliage. The leaves are shaped like a cross and have four leaflets that are heart-shaped and slightly succulent. The leaflets are variegated with shades of green, brown, and purple, and they have a unique texture that resembles that of a cut crystal.
The plant produces numerous stems that rise above the foliage and bear clusters of bright pink or white flowers. The flowers have five petals that are arranged in a star shape and are delicate and attractive.
Uses
Oxalis eckloniana C.Presl var. robusta T.M.Salter is primarily used as an ornamental plant in gardens, containers, and hanging baskets. The plant is attractive and provides year-round interest due to its unique foliage and flowers. The Central Florida Zoo and Botanical Gardens uses this plant in their gardens.
Besides being aesthetically pleasing, the plant has several medicinal uses. The leaves of Oxalis eckloniana C.Presl var. robusta T.M.Salter are edible and are used in salads, soups, and stews. The plant is also rich in vitamin C and has antioxidant properties that help to boost the immune system and fight free radicals.
However, it should be noted that the leaves contain oxalic acid and should not be consumed in large quantities as it can lead to health problems.
Light Requirements
Oxalis eckloniana C.Presl var. robusta T.M.Salter is a plant that requires a significant amount of sunlight. It is recommended to place them in areas where they can get full sun exposure for extended periods. However, it is essential to avoid exposing them to extremely high temperatures, which can cause damage to the leaves.
Temperature Requirements
The plant prefers moderately warm temperatures ranging from 65-75°F (18-24°C). It is essential to maintain consistent temperatures to prevent damage to the growth of the plant. Extreme temperature fluctuations can cause shock to the plant, resulting in stunted growth or even death.
Soil Requirements
It is important to consider the soil type when growing Oxalis eckloniana C.Presl var. robusta T.M.Salter. They prefer well-draining soils that are slightly acidic, having a pH ranging from 5.5 to 6.0. Adequate drainage ensures that the plant roots do not become waterlogged, which can lead to root rot. This plant also requires nutrient-rich soil that is high in organic matter. Adding nutrients such as compost or manure can increase the soil's fertility and improve plant growth.
Cultivation Methods
Oxalis eckloniana C.Presl var. robusta T.M.Salter is a robust plant that can be easily propagated from stem cuttings and division. It grows best in well-draining soil and partial shade. Make sure to source high-quality planting soil and containers if planting in pots. For those living in areas that experience frost, it's best to cultivate this plant indoors as it can't tolerate frost.
Watering Needs
Watering needs will depend on the location and climate. Plants grown in temperate areas will require more watering than those in tropical regions. In general, it's best to water Oxalis eckloniana C.Presl var. robusta T.M.Salter when the top inch of the soil feels dry. Overwatering this plant can lead to root rot, so it's critical to make sure the soil is well-draining and not waterlogged.
Fertilization
Oxalis eckloniana C.Presl var. robusta T.M.Salter requires moderate fertilization. The plant can tolerate general-purpose fertilizers. However, it's best to use organic fertilizers designed for acid-loving plants, especially if cultivating the plant in a pot. Fertilizers should be applied after the first flush of flowers has faded.
Pruning
Pruning is generally not necessary for this plant. However, removing yellow or dead leaves may increase air circulation and prevent disease. Cutting back spent flowers can also encourage the growth of more flowers.
Propagation of Oxalis eckloniana C.Presl var. robusta T.M.Salter
Oxalis eckloniana C.Presl var. robusta T.M.Salter, also known as the robust sorrel or pink oxalis, is a perennial plant that is native to South Africa. It is a small, low-growing plant with pink flowers and clover-shaped leaves that can asexually reproduce through different propagation methods.
Division
Division is one of the most common and effective methods for propagating the Oxalis eckloniana C.Presl var. robusta T.M.Salter. This method involves dividing the plant’s rhizomes into smaller sections, each containing at least one healthy shoot and a portion of the rhizome, which can develop into new plants. This method can be done during the growing season, and it is essential to ensure that each division has enough time to establish itself before winter.
Cuttings
Another method of propagating Oxalis eckloniana C.Presl var. robusta T.M.Salter is through stem cuttings. Select a healthy stem and cut it into 4-6 inch long cuttings just below the node. Dip the cut end into root hormone and plant the cutting into a pot filled with moist soil mixture. Place the pot in a location where it gets enough light and warmth. Water regularly and keep the soil moist until the cutting establishes roots, and new growth appears.
Seeds
Although it is possible to propagate Oxalis eckloniana C.Presl var. robusta T.M.Salter from seeds, it is not a preferred method because the plant's seeds have a lower germination rate. To propagate from seeds, sow the seeds in a tray or pot filled with moist soil. Cover the seeds lightly with soil, and keep them in a warm, humid area with filtered sunlight. Keep the soil moist and wait for the seeds to germinate, which takes around 2-3 weeks. Once the seedlings have grown a few inches tall, you can transplant them into their individual pots.
Disease and Pest Management for Oxalis eckloniana C.Presl var. robusta T.M.Salter
Oxalis eckloniana C.Presl var. robusta T.M.Salter is a hardy plant, but it is still susceptible to various pests and diseases. Proper care and management practices can help prevent these issues and keep the plant healthy.
Common Diseases
One of the most common diseases that affect Oxalis eckloniana C.Presl var. robusta T.M.Salter is Leaf Spot. This fungal disease causes yellow or brown spots on the leaves which can eventually lead to the death of the plant. Powdery Mildew is another disease that affects this plant. It appears as a white powdery substance on the leaves and can cause them to distort and crumple.
To manage these diseases, it is important to keep the plant dry by avoiding overhead watering. Remove any infected leaves immediately and discard them. There are also fungicides available that can help manage these diseases.
Common Pests
Mites and aphids are common pests that can infest Oxalis eckloniana C.Presl var. robusta T.M.Salter. Mites cause damage to the plant by sucking on the sap of the leaves. This leads to discolored spots and distorted leaves. Aphids, on the other hand, cause yellowing and curling of the leaves.
One way to manage these pests is by cleaning the plant regularly with a damp cloth. This helps remove any pests that may be present. There are also insecticides available to help manage mites and aphids.
Overall, proper care and management practices such as maintaining proper watering, removing infected leaves, and cleaning the plant regularly can go a long way in preventing diseases and pests from affecting Oxalis eckloniana C.Presl var. robusta T.M.Salter.
