Origin
Eriogonum inerme (S. Wats.) Jepson var. inerme is a perennial plant in the Buckwheat family Polygonaceae. Its native range extends from Oregon to Baja California, Mexico.
Common Names
Common names for Eriogonum inerme (S. Wats.) Jepson var. inerme include Smooth Buckwheat, Waldo Buckwheat, and St. Helena Buckwheat.
Appearance
Eriogonum inerme (S. Wats.) Jepson var. inerme grows as a small shrub with a woody base and numerous slender stems, ranging from 20-80 cm tall. Its leaves are narrow and elongated, measuring 2-6 cm long and 1-3 mm wide, with smooth edges and a green-gray color. The plant blooms from May to July with clusters of white to pinkish flowers on the tips of the stems, which attract bees and butterflies.
Uses
Eriogonum inerme (S. Wats.) Jepson var. inerme is an important plant in its native range, providing food and habitat for numerous species of pollinators, birds, and mammals. It is also used as a traditional medicinal plant by several Native American tribes for treating various ailments such as sore throats and coughs. In addition, Eriogonum inerme (S. Wats.) Jepson var. inerme is a popular ornamental plant in gardens and as a landscaping feature.
Light Requirement
Eriogonum inerme (S. Wats.) Jepson var. inerme commonly known as smooth wild buckwheat requires full sun exposure. The plant grows best when exposed to direct sunlight for at least six hours a day. Lack of adequate light may affect the plant's flowering, growth and development.
Temperature Requirements
Eriogonum inerme (S. Wats.) Jepson var. inerme grows in hot and dry conditions. The plant thrives in USDA hardiness zones 9 to 10, where temperatures range between 20-30 °C. Optimum growth occurs at an average temperature of 25 °C, while low temperatures that drop below 5°C may affect the plant drastically. Frost or freezing temperatures can damage and kill the plant.
Soil Requirements
Eriogonum inerme (S. Wats.) Jepson var. inerme prefers well-draining sandy loam to silty loam soil with a pH range between 6.5-7.5. The plant can tolerate a wide range of soil conditions but does not thrive well in clay or waterlogged soils. Soil with high organic matter content is ideal for the plant's growth and productivity.
Cultivation methods:
Eriogonum inerme (S. Wats.) Jepson var. inerme is a low-maintenance plant and is relatively easy to cultivate. It thrives in full sun to partial shade and prefers dry to medium moisture. The plant can tolerate drought, heat, and poor soil.Watering needs:
Eriogonum inerme tolerates drought but needs occasional watering during prolonged dry spells, especially when young or newly planted. Water the plant deeply once a week, saturating the soil around the plant's roots, to encourage deep root growth.Fertilization:
Eriogonum inerme prefers poor to moderately fertile soil and rarely requires fertilizers. Applying a balanced fertilizer once a year in spring or fall can enhance the plant's growth. However, excessive fertilization can result in lush foliage and fewer flowers, negating the plant's aesthetic value.Pruning:
Eriogonum inerme does not require pruning. However, some gardeners may trim the plant back by one-third in late fall or early spring to encourage bushier growth and promote an abundant display of flowers during the summer months. Deadheading or removing the spent flowers can prolong the blooming period and encourage the plant to put more energy into producing new flowers.Propagation of Eriogonum inerme (S. Wats.) Jepson var. inerme
Eriogonum inerme (S. Wats.) Jepson var. inerme, commonly known as smooth stem wild buckwheat, is a herbaceous perennial plant that is native to California.
Propagation of E. inerme can be done through several methods such as seeds, cuttings, and division.
Seeds
The most common method of propagating E. inerme is through seeds. The seeds are typically collected from mature plants and can be planted directly into the ground or in trays with potting soil. The seeds germinate best under warm temperatures, within a range of 65-85°F (18-29°C), and moderate moisture. It can take up to two months for the seeds to germinate, and the seedlings should be monitored regularly for proper growth.
Cuttings
Propagation of E. inerme can also be done through cuttings, although this method is less common. The cuttings should be taken from new growth in the spring or early summer. The cuttings should be about 4-6 inches in length and placed in moist sand or vermiculite. The cutting container should be kept in a warm, bright location. It can take several weeks for roots to develop, and the cuttings should be transplanted once they have established roots.
Division
E. inerme can also be propagated through division. This method is best done in the fall or early spring when the plant is not actively growing. The plant should be dug up and the root ball should be carefully separated into sections, making sure that each section has enough roots and foliage to support further growth. The separated sections should be replanted immediately in well-draining soil and watered thoroughly.
Disease and Pest Management for Eriogonum inerme (S. Wats.) Jepson var. inerme
Eriogonum inerme (S. Wats.) Jepson var. inerme, also known as smooth stem wild buckwheat, is a hardy plant that is resistant to most diseases and pests. However, some common diseases and pests can affect the plant, especially in moist or humid conditions.
Diseases
Fungal diseases can cause leaf spots, stem cankers, and root rot in Eriogonum inerme. Powdery mildew, caused by the fungus Erysiphe cichoracearum, can also affect the plant, especially in humid conditions. To manage fungal diseases, remove and destroy affected plant parts, maintain good air circulation around the plant, and avoid overhead watering. Applying a fungicide may also be necessary, but should be used as a last resort.
Pests
The most common pest that affects Eriogonum inerme is the buckwheat gall fly (Rhopalomyia californica). The larvae of this fly feed on the leaves and stems of the plant, causing galls to form. To manage this pest, remove and destroy affected plant parts and apply a pesticide labeled for use on leaf-feeding insects. However, be careful when using pesticides as they can harm beneficial insects as well.
Other pests that can affect Eriogonum inerme include spider mites, aphids, and thrips. To manage these pests, spray the plant with a strong stream of water to dislodge them, and introduce natural predators such as ladybugs and lacewings. Applying insecticidal soap or neem oil may also help to control these pests.
In conclusion, while Eriogonum inerme is generally a hardy plant, it can still be susceptible to certain diseases and pests. By following good cultural practices and using appropriate pest management methods, you can help keep your plant healthy and thriving.
