Description of Eriogonum subalpinum Greene
Eriogonum subalpinum Greene, commonly known as alpine buckwheat or subalpine wild buckwheat, is a flowering perennial plant that belongs to the Polygonaceae family. This species is native to the western United States, particularly in the subalpine and alpine regions of California, Idaho, Nevada, Utah and Wyoming.
General Appearance
The plant is characterized by its small and compact size, growing up to only 3-10 cm tall, but with a dense, rounded outline. It produces dense clusters of small, creamy-white flowers, which bloom from June to August and attract pollinators such as butterflies and bees. The leaves are evergreen, spoon-shaped and can grow up to 1-2 cm in length.
Common Uses
Eriogonum subalpinum Greene has a number of traditional medicinal uses by the Native Americans. It has been used to treat colds, headaches, and stomach issues. However, due to limited research, it is not recommended for medicinal use.
Additionally, this plant is often included in rock gardens and alpine landscapes because of its small size and attractive flowers. It can also be used as ground cover to help control soil erosion, as it has an extensive root system.
Conservation Status
Eriogonum subalpinum Greene is considered a “species of concern” by the United States Forest Service because of its limited distribution and vulnerability to climate change. Its natural habitat is also under threat due to human activities such as mining, grazing, and recreational activities.
In conclusion, Eriogonum subalpinum Greene is a unique and beautiful plant species found in subalpine and alpine regions of the western United States. Its low stature, evergreen leaves, and clusters of creamy-white flowers make it a desirable landscaping plant. However, it is threatened by declining habitat due to climate change and human activities.
Light Requirements
The Eriogonum subalpinum Greene plant thrives in full sun exposure. It requires a minimum of six hours of direct sunlight in a day to grow to its optimal size. Insufficient light conditions may lead to weak, spindly plants, and decreased flowering.
Temperature Requirements
The Eriogonum subalpinum Greene plant prefers a cold and temperate climate, and it can tolerate sub-zero temperatures during winter. The plant is hardy in USDA zones between 4 and 8 and needs a minimum of 90 frost-free days to grow and flower. Temperatures between 60 to 70 °F are optimal for growth, and the plant can't withstand temperatures above 80 °F for extended periods.
Soil Requirements
The Eriogonum subalpinum Greene plant does well in well-draining soils, preferably sandy or loamy soils with a pH range between 5.0 and 7.5. The plant can't tolerate wet soils as they can cause root rot, which can quickly kill the plant. Adding organic material to the soil before planting ensures that the soil is rich in nutrients, has good drainage, and retains moisture.
Cultivation
Eriogonum subalpinum Greene, commonly known as dwarf alpine buckwheat, is a herbaceous perennial plant. It thrives well in full sun, well-drained soil, and cold climate conditions. It is naturally found in high-elevation alpine and subalpine meadows, but it can be grown in rock gardens and border landscapes.
The plant can be propagated using seed or division. The seeds should be sown in spring or fall and should be lightly covered with soil. They may take from one to two years to germinate and establish. The plant can also be propagated by division either in spring or fall when it is dormant.
Watering
Watering should be moderate for Eriogonum subalpinum Greene. The plant is adapted to drought conditions, and overwatering may lead to waterlogging and root rot. The plant should be watered thoroughly once a week during the growing season or when the topsoil layer is dry to the touch. During winter, the plant should not be overwatered, but it should not be allowed to dry out completely.
Fertilization
Eriogonum subalpinum Greene does not require frequent fertilization, but it may benefit from occasional feeding. Fertilization should be done in the early spring using a slow-release fertilizer. The fertilizer should be evenly distributed around the plant, and it should be watered in well. Organic fertilizers such as compost or well-rotted manure may also be used.
Pruning
Pruning is not necessary for Eriogonum subalpinum Greene. However, the plant may benefit from deadheading. Deadheading is the process of removing old, dead flowers to promote new growth and enhance the plant's appearance. It should be done regularly during the growing season. For plants that have become too leggy or overgrown, they may be cut back to the ground in spring to promote new growth.
Propagation methods for Eriogonum subalpinum Greene
Eriogonum subalpinum Greene, commonly known as subalpine buckwheat, is a perennial plant that is native to the western United States. This plant is known for its attractive silver-gray foliage and its showy, bright yellow flowers that bloom from June to August.
Propagation by seed
Eriogonum subalpinum is propagated through seeds, which are usually sown either in fall or spring. The plant grows best in a sandy or rocky, well-drained soil and requires a sunny location. The seeds of the plant should be sown at a depth of 1/8 inch in the soil. Water the seedbed regularly until germination occurs and keep it moist until the plants become established. The plant is slow-growing and may take up to 2-3 years to reach maturity.
Division of root clumps
The plant can also be propagated through the division of root clumps. This method is best done in late spring or early fall. The plant should be dug up, and root clumps should be carefully separated using a sharp knife. The divisions should be replanted immediately in well-drained soil with adequate water. It is important to note that Eriogonum subalpinum has a deep, extensive root system, so take care not to damage the roots when separating the clumps.
Cuttings
Eriogonum subalpinum can also be propagated from cuttings taken from new growth. The cuttings should be taken in early spring and can be about 2-3 inches long. The cuttings should be planted in a pot with well-draining soil and should be kept moist until they root. Once they have rooted, they can be planted in a well-drained location and watered regularly until they become established.
Overall, understanding the propagation methods of Eriogonum subalpinum Greene is important when looking to grow and care for this plant. Whether using division of root clumps, seed propagation, or cuttings, it is essential to ensure that the plant is established in a well-drained soil and a sunny location to ensure the best results.
Disease management
Eriogonum subalpinum Greene is generally a healthy plant. However, there are a few diseases that can affect it. One common disease that affects this plant is powdery mildew. Powdery mildew is a fungal disease that thrives in warm, humid conditions. It can cause a white or grayish powdery substance to form on the leaves, stems, and flowers of the plant. To prevent powdery mildew, avoid overwatering the plant and increase air circulation. Remove infected leaves and treat the plant with a fungicide if necessary.
Another disease that can affect Eriogonum subalpinum is bacterial blight. Bacterial blight can cause wilting, leaf spots, and stem cankers. To prevent bacterial blight, avoid overhead watering and remove infected plant material. Sanitize pruning tools with a bleach solution after each use, and treat the plant with a bactericide if necessary.
Pest management
Eriogonum subalpinum is generally resistant to pests. However, there are a few pests that can affect the plant. One common pest is spider mites. Spider mites are tiny pests that can cause the leaves to turn yellow and eventually fall off. To prevent spider mites, keep the plant well hydrated and increase humidity. If an infestation occurs, remove infected leaves and treat the plant with an insecticide or a miticide.
Another pest that can affect Eriogonum subalpinum is aphids. Aphids are small insects that can cause a yellowing of the leaves and stunted growth. To prevent aphids, keep the plant well watered and increase air circulation. If an infestation occurs, remove infected leaves and treat the plant with an insecticide.
