Origin
The plant Chrysothamnus viscidiflorus (Hook.) Nutt. var. molestus Blake, commonly known as the Mancos rabbitbrush or chaparral rabbitbrush, is native to the western regions of the United States, including Arizona, California, Colorado, Nevada, New Mexico, Texas, and Utah. It grows in various habitats, including mountains, deserts, and grasslands, at altitudes ranging from 1,200 to 9,200 feet.
Common Names
Aside from the Mancos rabbitbrush and chaparral rabbitbrush, Chrysothamnus viscidiflorus var. molestus also goes by the names of sticky rabbitbrush and sticky goldenweed. These names all describe the plant's characteristically sticky leaves and stems, as well as its appearance.
Uses
The plant has great ecological importance in the western United States, serving as food and nesting material for various animals like rabbits and birds. It also provides significant erosion control on disturbed lands, and it can be commercially cultivated to restore damaged rangelands. Medicinally, some Native American tribes traditionally used the plant to treat diarrhea, flu, and other ailments. In addition, the plant is ornamental, and it is often used in residential or commercial landscaping because of its appealing yellow flowers.
General Appearance
Chrysothamnus viscidiflorus var. molestus is a shrub that grows up to six feet tall. Its branches are thin, erect, and densely arranged, giving it a compact appearance. The leaves are lance-shaped, sticky, and fragrant. These sticky leaves are an adaptation that helps the plant retain moisture, preventing water loss in arid environments. The plant's golden-yellow flowers are also sticky and grow in clusters at the tips of the branches, often blooming between August and October.
Light Requirements
Chrysothamnus viscidiflorus (Hook.) Nutt. var. molestus Blake typically grows in full sun and requires a minimum of six hours of direct sunlight each day. It can also tolerate partial shade, but excessive shade can lead to reduced growth and flowering.
Temperature Requirements
This plant thrives in a wide range of temperatures, including hot and arid conditions typical of its natural habitat. During the growing season, temperatures ranging from 65-85°F (18-29°C) are ideal. In the winter, this plant can tolerate temperatures as low as 0°F (-18°C).
Soil Requirements
Chrysothamnus viscidiflorus (Hook.) Nutt. var. molestus Blake grows best in well-drained, sandy or gravelly soils that are low in organic matter. It can tolerate a wide pH range, from acidic to alkaline soils, and can also grow in soils with high levels of salt or minerals. However, the plant is not tolerant of poorly drained soils, which can lead to root rot.
Cultivation
Chrysothamnus viscidiflorus (Hook.) Nutt. var. molestus Blake, commonly known as yellow rabbitbrush, is a perennial shrub native to North America. It grows best in full sun and requires well-drained soil with a pH range of 6 to 8.5. It is a hardy plant that can withstand temperatures as low as -30°F.
The shrub can be propagated through seeds or cuttings. Seeds should be planted in the spring or fall, while cuttings should be taken in the summer and planted in a soil mix that is equal parts sand and peat moss. The plant should be spaced 3 to 4 feet apart to allow adequate room for growth.
Watering Needs
Yellow rabbitbrush does not require a lot of water and can thrive in semi-arid conditions. In fact, overwatering can lead to root rot and other fungal diseases. The plant should be watered deeply once a week during the growing season and less frequently during periods of drought. Avoid getting water on the leaves and flowers, as this can cause them to rot.
Fertilization
Yellow rabbitbrush does not need a lot of fertilizer, as it can obtain most of its nutrients from the soil. However, a slow-release fertilizer can be applied in the spring to give the plant an extra boost. Make sure to follow the manufacturer's instructions when applying fertilizer.
Pruning
Yellow rabbitbrush does not require a lot of pruning and can be left to grow naturally. However, if the plant becomes too large or unruly, it can be pruned in early spring before new growth appears. Remove any dead or diseased branches and cut back any overly long branches to promote bushier growth.
Propagation of Chrysothamnus Viscidiflorus Var. Molestus Blake
Chrysothamnus viscidiflorus var. molestus Blake is commonly propagated through seeds, stem cuttings, and root cuttings. Propagation through seeds is the most common method and is highly recommended for large-scale commercial production.
Propagation through Seeds
Propagation through seeds is done by collecting ripe seeds during the fall when the plant starts to dry up. The collected seeds are then cleaned and stored in a cool and dry place until the next sowing season. Sowing is generally done during the spring when the soil temperature is warm enough for seed germination. The recommended soil temperature is between 70 and 80 degrees Fahrenheit. The seeds are sown directly in the soil and are covered with a thin layer of soil. Regular watering is needed until the seeds germinate and grow into seedlings.
Propagation through Stem Cuttings
Propagation through stem cuttings is done by taking cuttings from the plant during the active growth period. The cuttings should be approximately six inches long and should have a diameter of at least one-quarter inch. Before planting, the lower leaves should be removed, and the cut end should be dipped in rooting hormone. The cuttings are then planted in a potting mix that is moist and well-drained. The potting mix should be kept moist, and the plant should be kept in a warm and humid place until the plant roots. Once the plant roots and starts growing, it can be transplanted to a permanent location.
Propagation through Root Cuttings
Propagation through root cuttings is done by digging up the plant during the dormant period. The roots are then cut into sections, with each section having at least one or two buds. The root cuttings should be planted sideways, with the buds facing up, in potting soil that is moist and well-drained. The potting soil should be kept moist, and the plant should be kept in a warm and humid place until it starts growing. Once the plant starts growing, it can be transplanted to a permanent location.
Disease Management for Chrysothamnus viscidiflorus
Chrysothamnus viscidiflorus is a hardy plant, but it is still susceptible to a few diseases that can hinder its growth and overall health. Luckily, there are some steps that can be taken to manage these diseases.
Septoria Leaf Spot
Septoria leaf spot is a fungal disease that causes small brown spots to appear on the plant's leaves. To manage this disease, affected leaves should be pruned and destroyed. Additionally, providing proper plant spacing and ensuring good air circulation can help prevent the disease from spreading.
Root Rot
Root rot is a fungal disease that causes the plant's roots to rot, leading to stunted growth and, potentially, death. To manage this disease, it's important to avoid overwatering and to ensure the plant is growing in well-draining soil. In severe cases, affected plants may need to be removed to prevent the spread of the disease to healthy plants.
Pest Management for Chrysothamnus viscidiflorus
Chrysothamnus viscidiflorus may also be susceptible to attacks from pests. Effective pest management can help prevent damage to the plant and promote healthy growth.
Aphids
Aphids are small, sap-sucking insects that can cause leaves to yellow and wilt. They can be managed by washing the affected plant with a strong spray of water to dislodge the insects. If the infestation persists, insecticidal soap or neem oil can be used.
Spider Mites
Spider mites are tiny arachnids that feed on the plant's leaves, causing them to become discolored and distorted. To manage these pests, the plant should be washed with a strong spray of water and treated with insecticidal soap or neem oil if necessary.
By implementing proper disease and pest management techniques, Chrysothamnus viscidiflorus can thrive and continue to be a beautiful addition to any garden or landscape.
