Overview
Cleomella obtusifolia Torr. & Frém. var. pubescens A. Nels. is a plant native to North America. It belongs to the Cleomaceae family and is commonly known as the hairy spider flower or blunt-leaf spider-flower.
Appearance
The plant has slender stems that can grow up to 1.5 meters tall. The oval-shaped leaves are alternate and have a hairy texture on both the upper and lower surfaces. The plant produces small white or pink flowers with four petals and six stamens. The flowers are clustered at the top of the stems and bloom from May to September.
Uses
The hairy spider flower has been traditionally used as a medicinal plant by Native Americans. It was used to treat various ailments, such as coughs, colds, and sore throats. The plant also has antibacterial properties and was used to treat infections.
In addition to its medicinal properties, the plant is also ornamental and can be used in landscaping. The flowers are attractive to pollinators such as bees and butterflies.
Cultivation
The hairy spider flower is a hardy plant that can grow in a variety of soil types. It prefers full sun and well-draining soil. The plant requires regular watering and can tolerate some drought. It can be propagated by seeds or cuttings.
Light Requirements
Cleomella obtusifolia var. pubescens typically requires full sunlight for optimal growth. It thrives in warm, arid environments that receive at least six hours of direct sunlight each day. In shaded areas, the plant may grow but could be more leggy, with fewer flowers and a weaker structure.
Temperature Requirements
This plant is native to the southwestern United States and therefore prefers a hot and dry climate. It can tolerate temperatures ranging from 40°F to 100°F but grows best in temperatures between 70°F to 90°F. In colder climates with chilly winters, Cleomella obtusifolia var. pubescens can be grown as an annual.
Soil Requirements
Cleomella obtusifolia var. pubescens grows best in well-draining, sandy soil with a pH between 6.0 and 7.5. It can tolerate some soil salinity and is often found growing in nutrient-poor soils. It is also drought-tolerant and can survive extended periods without water. However, during periods of prolonged drought, the plant may go dormant to conserve energy and protect itself from the arid conditions.
Cultivation Methods
Cleomella obtusifolia Torr. & Frém. var. pubescens A. Nels. is a hardy plant that can thrive in a range of soil types, including rocky or sandy soils. The plant requires soil that is well-draining, and it prefers a pH level of around 6.5. Growers should ensure that the plant receives full sun exposure, as it cannot tolerate shade.
In terms of planting, the plant should be sowed directly into the ground in the spring when the soil has warmed up. Seeds should be planted at a depth of around ½ an inch, and each seed should be spaced around 4 inches apart.
Watering Needs
Cleomella obtusifolia Torr. & Frém. var. pubescens A. Nels. prefers to grow in a dry environment and does not require much water. Growers should avoid overwatering, as this can cause root rot, particularly in poorly-draining soils. A good rule of thumb is to water the plant once per week, or when the soil has become dry to the touch.
Fertilization
While some gardeners may choose to fertilize their Cleomella obtusifolia Torr. & Frém. var. pubescens A. Nels. plants, it is not necessary, as the plant is able to thrive in nutrient-poor soils. However, if growers wish to fertilize, a good option is a balanced, all-purpose fertilizer applied at half strength every other month during the growing season.
Pruning
Cleomella obtusifolia Torr. & Frém. var. pubescens A. Nels. does not require much pruning as it naturally has a compact growth habit. However, growers may choose to prune the plant if they wish to control its shape or size or remove any damaged or dead branches. Pruning should be done in the late winter or early spring before new growth begins.
Propagation of Cleomella Obtusifolia Torr. & Frém. var. Pubescens A. Nels.
Cleomella Obtusifolia Torr. & Frém. var. Pubescens A. Nels. can be propagated through two methods: seed propagation and vegetative propagation.
Seed Propagation
Seeds of Cleomella Obtusifolia Torr. & Frém. var. Pubescens A. Nels. can be sown directly into the soil in the spring or fall. The seeds should be sown at a depth of approximately ¼ inch and spaced about 6-12 inches apart. The soil should be kept moist, but not waterlogged. Germination occurs within two to four weeks.
Alternatively, the seeds can be started indoors before the last frost in the spring. The seeds should be sown in flats or small pots filled with a good quality seed-starting mix. The seeds should be lightly covered with soil and the soil should be kept moist. Once the seedlings have emerged, they can be transplanted into individual containers and grown indoors until they are established and ready to be transplanted outside.
Vegetative Propagation
Vegetative propagation of Cleomella Obtusifolia Torr. & Frém. var. Pubescens A. Nels. can be done through stem cuttings. Stem cuttings should be taken in the summer, when the plant is actively growing. Cuttings should be about 4-6 inches long and should be taken from healthy, disease-free plants.
Remove the leaves from the bottom 2 inches of the cutting and dip the cut end into rooting hormone. Place the cutting in a container filled with a good quality potting mix. The container should be covered with a plastic bag or placed in a propagator to help maintain humidity and encourage rooting. Cuttings should be kept in a warm, bright location but out of direct sunlight. It takes about 4-6 weeks for cuttings to develop strong roots and be ready for transplanting.
Disease and Pest Management for Cleomella obtusifolia Torr. & Frém. var. pubescens A. Nels.
Cleomella obtusifolia Torr. & Frém. var. pubescens A. Nels. is a desert plant that is generally resistant to pests and diseases. However, it can occasionally suffer from some problems that can affect its growth and overall health.
Common diseases affecting Cleomella obtusifolia Torr. & Frém. var. pubescens A. Nels.
Cleomella obtusifolia Torr. & Frém. var. pubescens A. Nels. can be susceptible to fungal diseases like powdery mildew and rust. Powdery mildew usually appears as a white or gray powdery substance on the leaves, while rust appears as brownish-red patches.
To manage these diseases, it is essential to ensure good air circulation by spacing the plants appropriately. Also, avoid overhead watering as wet foliage creates an environment that fosters these diseases. Fungicides can treat these diseases, but always follow the instructions on the label carefully and wear protective clothing.
Common pests affecting Cleomella obtusifolia Torr. & Frém. var. pubescens A. Nels.
Aphids and spider mites are common pests that may affect Cleomella obtusifolia Torr. & Frém. var. pubescens A. Nels. Aphids suck the sap from the plant, causing discoloration and distortion of the leaves. Spider mites, on the other hand, pierce the leaves to suck the plant's juices, causing yellowing of the leaves.
To manage these pests, you can use horticultural oils or insecticidal soaps to spray on the plants, ensuring to cover the undersides of the leaves thoroughly. You can also release ladybugs, lacewings, or other beneficial insects to prey on the pests.
In conclusion, although Cleomella obtusifolia Torr. & Frém. var. pubescens A. Nels. is resistant to pests and diseases, it is still vulnerable to some problems. Early detection and appropriate management measures can help prevent severe infestations and damage to the plant's health.
