Origin
Eriogonella spinosa, also known as the spiny eriogonum, is a native plant species of North America. It can be found throughout many western states, including California, Nevada, and Arizona.
Common Names
In addition to its scientific name, Eriogonella spinosa has several common names, including spiny wild buckwheat, spiny eriogonum, and spiny sulfur flower.
Uses
Eriogonella spinosa is not well-known for its medicinal uses, but some Native American tribes have used its roots to make a tea for treating toothaches. Additionally, this plant plays an important role in the ecosystem as it provides habitat and food for different wildlife, such as birds, bees, and other insects.
General Appearance
Eriogonella spinosa is a drought-tolerant perennial plant that grows in a compact, mounding form. It is small in size, typically only reaching 6-10 inches in height and spreading up to 2 feet wide. Its leaves are lance-shaped and covered in dense, silvery hairs, giving them a soft texture. The plant's flowers are small in size, usually with a yellowish-green hue and spiky, bristly inflorescences that bloom from late spring to mid-summer. The most noticeable feature of the plant is its prickly seed heads, which are covered in dense spines and give it its common name, spiny eriogonum.
Light Requirements
Eriogonella spinosa typically grows well in full sunlight to partial shade. In areas with extreme heat, it may require shade to prevent excessive heat stress. However, if grown in too much shade, the plant may become spindly and fail to develop properly.
Temperature Requirements
The plant prefers temperatures between 60-80°F (15-27°C) and requires mild winters to survive. It cannot tolerate extreme cold, especially below 20°F (-6°C). Therefore, it is best suited for USDA Hardiness Zones 8 through 10.
Soil Requirements
Eriogonella spinosa can grow in a range of soils, including loam, sandy loam, and clay loam. However, they prefer well-drained soils with good water retention capacity. The soil pH level should be between slightly acidic to neutral (6.0-7.5). Additionally, the plant requires moderate to low nutrient soil, as high nutrient soil can encourage leaf growth but reduce flowering.
Cultivation Methods
Eriogonella spinosa, commonly known as spiny wild buckwheat, is a low-growing perennial shrub that can be propagated through seeds or stem cuttings. The plant prefers well-draining soil and full sunlight exposure. If you are planting from seeds, sow them outdoors in springtime after the last frost. If the soil is not well-draining, amend it by adding a layer of sand or gravel to the bottom of the planting hole. The plant requires little intervention once established.
Watering Needs
Water the plant lightly but regularly until it becomes established. Once established, the plant will only require watering during extended dry periods. The plant can tolerate drought but overwatering can cause root rot, so be mindful of the soil moisture levels. Avoid overhead watering to prevent the leaves from getting wet and to minimize the risk of diseases.
Fertilization
Eriogonella spinosa does not require frequent fertilization. In fact, excessive fertilization can cause lush growth, which will attract pests and potentially cause disease. A light application of slow-release, balanced fertilizer in the spring is sufficient for the plant's needs. You can also add a layer of organic mulch around the plant to help retain moisture and add nutrients to the soil.
Pruning
Eriogonella spinosa does not require frequent pruning but can benefit from a light pruning in the fall or early spring. This will help shape the plant and promote fuller growth. Remove any dead, diseased, or damaged branches as soon as possible to prevent the spread of pests and disease. If you want to keep the plant smaller or encourage bushier growth, you can prune back the tips of the stems after the first flush of blooms has faded.
Propagation of Eriogonella spinosa (S. Wats.) Goodman
Eriogonella spinosa (S. Wats.) Goodman, commonly known as spiny wild buckwheat, is a low-growing perennial plant native to western North America. Propagation of this plant can be done by seeds or cuttings.
Propagation by Seeds
Add a layer of sand or gravel at the bottom of the planting container to improve drainage. Fill the container with a well-draining potting mix and moisten it slightly. Scatter the seeds over the surface of the soil and press them gently into the surface. Cover the seeds with a thin layer of fine-grained sand.
Water the container gently and place it in a warm, well-lit location. The ideal soil temperature for germination is approximately 65 to 75 degrees Fahrenheit. Keep the soil moist but not waterlogged. Germination should occur in 1 to 2 weeks.
After approximately 4 to 6 weeks, the seedlings should be large enough to be transplanted into larger containers or into the ground outdoors. Plant them in well-draining soil in a sunny location. Water regularly until established.
Propagation by Cuttings
Take a cutting from a healthy Eriogonella spinosa plant during the growing season. Cut a 5-inch section of new growth with a sharp knife or scissors. Remove the leaves from the bottom third of the cutting.
Dip the cut end of the stem in rooting hormone powder and shake off any excess. Insert the stem into a container filled with well-draining potting mix. Water the soil and cover the container with a clear plastic bag to create a greenhouse-like environment.
Place the container in a warm, well-lit location, but avoid direct sunlight. The cutting should root in approximately 4 to 6 weeks. Once roots have developed, transplant the cutting into a larger container or into the ground outdoors.
Propagation of Eriogonella spinosa can be a challenging process, but the rewards are worth it. With proper care and attention, this plant can thrive and add beauty to any garden or landscape.
Disease Management
Eriogonella spinosa (S. Wats.) Goodman is a relatively hardy plant that is resistant to many common plant diseases. However, there are a few diseases that may affect the plant, including root rot and powdery mildew.
To prevent root rot, it is important to avoid over-watering and to ensure that the plant has well-draining soil. If root rot does occur, it may be necessary to remove the affected roots and re-pot the plant in fresh soil.
Powdery mildew can be controlled through regular applications of a fungicide. It is also important to promote good air circulation around the plant and to avoid overcrowding.
Pest Management
Like many plants, Eriogonella spinosa (S. Wats.) Goodman is susceptible to a number of pests. Common pests that may affect the plant include mites, aphids, and whiteflies.
If mites are present on the plant, they can be removed by spraying the plant with water or applying insecticidal soap. Aphids and whiteflies can be controlled through regular applications of insecticides or by using natural predators such as ladybugs.
It is also important to monitor the plant closely for signs of pest infestations and to promptly address any issues to prevent further damage to the plant.
