Description of Cereus robinii (Lem.) L. Benson var. deeringii (Small) L. Benson
Cereus robinii (Lem.) L. Benson var. deeringii (Small) L. Benson, commonly known as Deering's cactus, is a variety of the genus Cereus and belongs to the Cactaceae family. Native to the southwestern United States and northern Mexico, this cactus is found in desert regions at elevations ranging from sea level to 1,800 meters.
General Appearance
Deering's cactus is a tall, columnar cactus with a distinct cylindrical shape. It can reach heights of up to 12 meters and is usually about 30 cm in diameter. The cactus has numerous slender, ribbed stems that grow upright at first, then arch and droop at the tips. The stems are dark green and have 5-9 sharp, spiny ridges. The spines are needle-like and range in color from yellow to brown. The stems of this cactus are also covered in small, white, woolly areoles from which the cactus produces its flowers and fruits.
Uses
Deering's cactus has various medicinal and ornamental uses. It has been used for treating numerous ailments such as pain, inflammation, and fever. In addition, it is used to make traditional Mexican medicine & is well known for healing injuries that fail to heal by themselves. In some areas, the pulp of the fruit is used as a natural dye. This cactus is also very popular as an ornamental plant, and it is grown in gardens and indoors for its striking appearance, unique shape, and attractive flowers.
In conclusion, Cereus robinii (Lem.) L. Benson var. deeringii (Small) L. Benson is an intriguing and versatile cactus that can serve both medicinal and ornamental purposes. Its unique appearance, easy propagation, and hardiness make it a popular and sought-after addition to residential and botanical gardens.Light Conditions
Cereus robinii (Lem.) L. Benson var. deeringii requires bright light conditions to thrive. It can tolerate some shade, but the plant prefers to receive direct sunlight for at least six hours per day. Insufficient light can cause the plant to become leggy and weak, reducing its overall aesthetic appeal.
Temperature Conditions
This plant is native to subtropical and tropical regions, which means it grows best in temperatures ranging from 60°F to 90°F. Temperatures below 50°F can cause the plant to become dormant, which may lead to a reduction in growth. Extreme heat, on the other hand, can cause the plant to wilt or even die. It's important to maintain consistent temperature conditions to promote healthy growth.
Soil Requirements
Cereus robinii (Lem.) L. Benson var. deeringii prefers well-drained soil that is rich in organic matter. The soil should have a pH level between 5.5 and 6.5. This plant can tolerate slightly acidic to slightly alkaline soils. It's important to avoid waterlogged soil, as this can cause root rot and other fungal diseases. A good soil mix for this plant would be equal parts perlite, sand, and peat moss.
Cultivation
Cereus robinii (Lem.) L. Benson var. deeringii (Small) L. Benson is an easy-to-grow plant that requires minimal care and attention. This plant can thrive in various conditions but prefers bright, indirect sunlight. It can be grown in a container or a hanging basket, depending on your preference.
When planting in a container, ensure that it is well-draining as the plant does not thrive in soggy soil. Additionally, the plant prefers soil with high organic content. When transplanting, do so in spring to allow the plant enough time to acclimate to its new environment.
Watering Needs
Cereus robinii (Lem.) L. Benson var. deeringii (Small) L. Benson requires minimal watering and can survive long periods without it. However, when watering, ensure that the soil is completely dry before doing so. Additionally, avoid over-watering the plant as this can lead to root rot and other fungal infections.
When watering, use room-temperature water that contains minimal minerals. This helps to prevent the build-up of salts in the soil, which can be harmful to the plant.
Fertilization
Cereus robinii (Lem.) L. Benson var. deeringii (Small) L. Benson requires minimal fertilization. However, when applying fertilizers, use a balanced fertilizer that contains equal amounts of nitrogen, phosphorus, and potassium. This helps to promote green foliage and healthy growth.
Fertilization should be done during the growing season, that is, from spring to fall. Additionally, avoid applying fertilizers during the winter as the plant is dormant during this period.
Pruning
Cereus robinii (Lem.) L. Benson var. deeringii (Small) L. Benson requires minimal pruning. However, it is advisable to remove any dead or yellowing stems to promote healthy growth. Additionally, you can prune the plant to control its size and shape.
Pruning should be done during the growing season, that is, from spring to fall, as this is when the plant is actively growing. Avoid pruning during the winter as the plant is dormant during this period.
Propagation of Cereus robinii var. deeringii
The Cereus robinii var. deeringii, commonly known as the Deering cactus, is a slow-growing species that belongs to the cactus family. It is a popular ornamental plant that can be propagated through several methods: seeds, cuttings, and grafting.
Propagation through Seeds
Propagation through seeds is a straightforward method of propagating Cereus robinii var. deeringii. The seeds should be harvested when the fruit is ripe, and the pulp is removed from the seeds. This can be done by soaking the fruit in water and peeling away the pulp from the seeds.
The seeds should be sown in a well-draining soil mixture, about 1/4 inch deep. The soil should be kept consistently moist but not waterlogged. The seeds should germinate within two to three weeks, depending on the temperature and humidity levels. Once the seedlings have reached a few inches in height, they can be transplanted into individual pots.
Propagation through Cuttings
Propagation through cuttings is a popular method for propagating Cereus robinii var. deeringii. The cutting should be taken from a healthy, mature plant during the growing season. It is best to take a cutting that is at least 6 inches long and has several segments.
The cutting should be allowed to callus over for a few days before being planted. Once the cutting has callused, it can be planted in a well-draining soil mixture that is kept consistently moist. It is important not to overwater the cutting, as this can cause it to rot. The cutting should root within a few weeks, at which point it can be transplanted into individual pots.
Propagation through Grafting
Grafting is a more advanced method of propagating Cereus robinii var. deeringii. It involves attaching a cutting of the plant onto the stem of another plant, called the rootstock.
The rootstock should be a healthy, mature plant of a closely related species. A portion of the stem of the rootstock should be removed, and the cutting of the Cereus robinii var. deeringii should be inserted into the cut. The two plants should be wrapped together to hold them in place until they have fused together.
Grafting should be done during the growing season when the plants are actively growing. It is a more complicated method of propagation but can be useful for producing large numbers of plants that are genetically identical to the parent plant.
Disease and Pest Management for Cereus robinii (Lem.) L. Benson var. deeringii (Small) L. Benson
Cereus robinii (Lem.) L. Benson var. deeringii (Small) L. Benson, commonly known as the Deering's tree cactus, is a slow-growing succulent that is native to southern Florida and the West Indies. While it is generally disease-resistant and pest-free, it may still be susceptible to certain pests and diseases. Here are some common problems that may affect the plant and tips on how to manage them:
Diseases
Cereus robinii (Lem.) L. Benson var. deeringii (Small) L. Benson is generally resistant to most diseases that affect plants. However, overwatering or poor drainage can lead to root rot. Symptoms of root rot include yellowing or wilting of leaves, and soft, mushy or discolored roots. To manage root rot, remove the affected plant from the soil, remove any diseased roots, and repot in fresh, well-draining soil. Allow the soil to dry out completely before watering again.
Pests
The Deering's tree cactus is generally pest-free. However, mealybugs and spider mites may occasionally infest the plant. Mealybugs look like small, cotton-like masses and are usually found in leaf axils or on the undersides of leaves. Spider mites are tiny, spider-like insects that suck the sap from the plant, causing yellowing or bronzing of the leaves.
To manage mealybugs, use a cotton swab dipped in rubbing alcohol to wipe them off. For spider mites, use a solution of water and mild dish soap and spray the affected plant. Be sure to rinse the plant thoroughly with water after a few hours to remove any soap residue. Regularly inspecting your plant and removing any pests as they appear can help prevent infestations.
In conclusion, Cereus robinii (Lem.) L. Benson var. deeringii (Small) L. Benson is a relatively easy plant to care for and is generally disease-resistant and pest-free. However, proper care, including well-draining soil and regular inspecting, is still necessary to maintain a healthy plant.
