Origin
Artemisia tyrellii Rydb. is a plant species that belongs to the family Asteraceae. This plant is native to North America, specifically found in Utah, Colorado, and Wyoming.
Common Names
Artemisia tyrellii Rydb. is commonly known as Tyrell's sagebrush or mountain sagebrush.
Uses
Historically, Tyrell's sagebrush, has been used by Native American tribes for medicinal purposes such as treating cold, flu, stomachaches, and menstrual cramps. Some tribes ingested the plant directly or infused it in water. Tyrell's sagebrush has also been used for its aromatic and cleansing properties. Compresses made from the leaves could be used to treat skin conditions such as eczema and poison ivy rash. Currently, there are no scientific studies that prove the efficacy of these traditional uses.
General Appearance
Tyrell's sagebrush is a shrub that typically grows up to 1 meter tall. It is a deciduous plant that sheds its leaves in the winter. The leaves are gray-green and have a silky texture. The stems and branches are thin and reddish-brown in color. The flowers are yellow or green and bloom in late summer to early fall. The plant grows in sagebrush habitat, rocky slopes, meadows, and disturbed areas.
Light Requirements
Artemisia tyrellii Rydb. prefers full sun exposure. It does not do well in shaded areas and requires at least six hours of direct sunlight per day to thrive.
Temperature Requirements
This plant is well-suited to grow in areas with a cold to temperate climate. It can tolerate temperatures as low as -20°C (-4°F) and as high as 25°C (77°F). However, an ideal temperature range for this plant is between 10°C (50°F) and 20°C (68°F).
Soil Requirements
The soil that Artemisia tyrellii Rydb. grows in should be well-draining and rich in organic matter. It prefers neutral to slightly alkaline soil with a pH ranging from 6.5 to 7.5. This plant also benefits from soil that is slightly sandy or loamy in texture.
Cultivation Methods
Artemisia tyrellii Rydb. is a hardy perennial plant that can thrive in a variety of growing conditions. It requires full sun or partial shade and can grow in most soil types, including poor, rocky, and sandy soils. The plant is tolerant of drought and cold weather and can survive in temperatures as low as -40°F (-40°C).
Propagation of Artemisia tyrellii Rydb. can be done through seeds or cuttings. Seeds should be sown in early spring or late fall, while cuttings should be taken in late spring or early summer. The plant can also be divided in the fall or early spring.
Watering Needs
Artemisia tyrellii Rydb. is a drought-tolerant plant that does not require a lot of water. However, it is important to keep the soil moist during the growing season. Watering is necessary once or twice a week, depending on the climate and the soil type. Overwatering can cause root rot and other fungal diseases.
Fertilization
Artemisia tyrellii Rydb. does not require regular fertilization. However, adding organic matter, such as compost or manure, to the soil can improve the plant's growth and health. Fertilizer can also be applied in the early spring to encourage new growth.
Pruning
Pruning is not necessary for Artemisia tyrellii Rydb. However, dead or damaged stems and foliage should be removed to promote healthy growth. The plant can also be trimmed in the fall to prevent it from becoming too leggy and to maintain its shape.
Propagation of Artemisia tyrellii Rydb.
The propagation of Artemisia tyrellii Rydb. can be done through several methods.
Seed propagation
Propagating the Artemisia tyrellii Rydb. through seed propagation method is possible, but it is a bit challenging. The seeds need to undergo a process called stratification, where the seeds are kept at low temperatures before planting for a specific period to break seed dormancy. The stratification process ensures better germination rates and increased chances of healthy plants in the end. The seeds should be sown in well-drained soil and not too deep. Once the plant is established, the chances of survival are higher.
Cuttings propagation
Propagation through cuttings is the easiest way of multiplying the Artemisia tyrellii Rydb. plant. Stem cuttings can be taken during the early summer to fall seasons. The cuttings should be about 8-10 cm long with a few leaves attached on the top to ensure photosynthesis. The bottom end can be directly planted into the rooting medium, preferably sandy soil mix. The cutting should be kept well-moistened, and the rooting medium should be kept in a shaded area to encourage better root formation. This process takes about 2-4 weeks to root and then should be carefully transplanted into individual containers for growth.
Division of rhizomes
Artemisia tyrellii Rydb. can also be propagated by the division of rhizomes. This method is typically done in the spring season. Wait until the soil has warmed up a bit before dividing the plants. The root system should be carefully dug up without damaging the roots. Each new plant should have a portion of rhizomes, leaves, and shoots. The divided plants need to be planted in well-prepared soil, and make sure to keep them hydrated until they establish.
Disease Management
Artemisia tyrellii Rydb. has the potential to develop some diseases that can affect its growth and productivity. Some of the common diseases affecting this plant include:
- Leaf Rust: This fungal disease causes yellow or orange pustules on the underside of leaves, affecting the photosynthesis process. To prevent this disease, it is recommended to plant resistant cultivars, avoid wetting the foliage when irrigating, and control weeds around the plants.
- Fusarium Wilt: This soil-borne fungal disease can cause wilting of the entire plant, stunting its growth and causing the leaves to turn yellow or brown. To manage this disease, it is recommended to rotate crops, avoid overwatering, and prevent soil compaction.
- Powdery Mildew: This fungal disease results in the development of a white powdery substance on the leaves and stems, reducing the plant's ability to photosynthesize. To prevent this disease, it is recommended to avoid overhead watering and increase airflow around the plants.
Pest Management
Artemisia tyrellii Rydb. can also be attacked by pests such as:
- Aphids: These small insects suck sap from the leaves and stems, causing yellowing, distortion, and wilting of the leaves. To control aphids, it is recommended to use insecticidal soaps, prune infested parts, and attract natural predators such as ladybugs and lacewings.
- Mites: These tiny pests also feed on plant sap, causing yellow or bronze discoloration and webbing on leaves and stems. To control mites, it is recommended to reduce plant stress through proper irrigation and fertilization, apply miticides, and prune severely infested parts.
- Cutworms: These larvae feed on the stems of young plants, cutting them at the base, hence killing the plants. To control cutworms, it is recommended to handpick and dispose of the larvae, apply biological control agents such as Bacillus thuringiensis (Bt) or use physical barriers such as collars around the plants.
