Origin
Solidago rigida L. var. glabrata E.L. Braun, commonly known as Oklahoma goldenrod, is a perennial plant species that is native to the United States. It is mainly found in the central and southern regions of the country, including states such as Oklahoma, Texas, Louisiana, and Arkansas.
Common Names
Aside from Oklahoma goldenrod, this plant species is also known by other common names such as stiff goldenrod and desert goldenrod.
Uses
The Oklahoma goldenrod has several uses, particularly in traditional medicine. The plant contains a compound called chicoric acid that has been found to have immune-boosting and anti-inflammatory properties. It has also been traditionally used to treat kidney stones, urinary tract infections, and chest congestion.
In addition to medicinal uses, the plant is also used in landscaping and gardening. Its vibrant yellow flowers and ability to attract pollinators such as bees and butterflies make it a popular choice for gardens and meadows.
General Appearance
The Oklahoma goldenrod plant can grow up to 3 feet tall and has a stiff, upright stem with narrow, lance-shaped leaves that grow up to 6 inches long. The flowers are small and yellow, and they bloom in dense clusters at the top of the stem. The plant typically blooms from late summer to fall and prefers well-drained soil and full sun exposure.
Light Requirements
The Solidago rigida L. var. glabrata E.L. Braun requires full sunlight to grow well. It cannot thrive in the shade or in low light conditions. Therefore, it is essential to plant it in areas that receive at least 6 hours of direct sunlight daily. Failure to provide adequate lighting can hinder the plant growth and cause poor flowering.
Temperature Requirements
The Solidago rigida L. var. glabrata E.L. Braun requires a temperature range of 60°F – 78°F (16°C – 26°C) to grow well. It can resist cold temperatures up to -40°F (-40°C) during dormancy. However, temperatures above 80°F (27°C) in summer can stress and weaken the plant. The plant can be destroyed by frost in winter if not well-tended.
Soil Requirements
The Solidago rigida L. var. glabrata E.L. Braun thrives in moderately fertile, well-drained soil. The plant prefers slightly acidic to neutral soil with pH levels between 5.5 and 7.0. It can also grow well in sandy loam, clay loam, or loamy soils. The soil should be moist but not wet, as waterlogged soil can cause root rot and kill the plant. Adding organic matter, such as compost or aged manure improves soil quality and enhances growth. The plant requires occasional watering during dry spells. Applying a layer of mulch around the plant helps to retain moisture in the soil, regulate temperature, and prevent weed growth.
Cultivation
Solidago rigida L. var. glabrata E.L. Braun, commonly known as stiff goldenrod, is a tough and durable plant that grows well in most soil conditions, but prefers well-drained, loamy soils. The plant requires full to partial sunlight to grow and should be planted in an area that receives ample sunlight daily. Solidago rigida L. var. glabrata E.L. Braun can be grown directly from seed or through transplantation. Seeds should be planted in early spring, while transplanting can be done throughout the growing season.
Watering Needs
Stiff goldenrod requires moderate watering, and the soil should never be allowed to dry out between waterings. Water the plant deeply once a week, especially during dry spells, to ensure adequate moisture. Be sure not to overwater, as this can cause root rot and other issues.
Fertilization
Stiff goldenrod is a low-maintenance plant that does not require frequent fertilization. Apply a balanced, slow-release fertilizer once or twice a year, in early spring and mid-summer. Be careful not to over-fertilize, as this can lead to excessive foliage growth at the expense of flower production.
Pruning
Pruning stiff goldenrod is not necessary, but deadheading spent blooms will help keep the plant looking neat and tidy. After the first round of blooms has faded, cut off the flower stalk close to the base. This will encourage the plant to produce a second round of flowers, extending the blooming season. In the fall, once the plant has finished blooming, cut it back to the ground to prepare for the winter months.
Propagation of Solidago rigida L. var. glabrata E.L. Braun
Solidago rigida L. var. glabrata E.L. Braun, commonly known as stiff goldenrod, is a herbaceous perennial plant that belongs to the Asteraceae family. Propagation of the plant can be done through various methods. It is important to note that the timing of propagation varies depending on the method used.
Division
Division is one of the easiest and most common methods of propagation for Solidago rigida L. var. glabrata E.L. Braun. It can be done in spring or fall when the plant is dormant. To propagate through division, gently dig out the plant's root system using a garden fork. Divide the clumps into smaller sections such that each section has at least one shoot and one strong root system. Transplant these sections into prepared beds or containers and water them thoroughly.
Cuttings
Propagation through cuttings is feasible for Solidago rigida L. var. glabrata E.L. Braun but needs careful attention. This method involves taking cuttings from stem tips in summer or fall. Cut a 4-6 inch section of the stem and remove the lower leaves. Dip the bottom end of the cutting into rooting hormone then place it in a container filled with planting medium. Keep the pot moist and in a warm, humid location with indirect sunlight. Rooting should occur in 4-6 weeks.
Seeds
Propagation using seeds can be done in fall or early spring. Collect mature seed heads from the plant and store them in a cool, dry place until ready to use. Sow the seeds in prepared soil, making sure they are covered by a thin layer of soil. Water daily and keep the growing medium consistently moist until germination occurs. Once seedlings have grown to about an inch, thin them out to achieve a spacing distance of approximately 18-24 inches.
Propagation of Solidago rigida L. var. glabrata E.L. Braun is an easy and straightforward process. The sought-after result is healthy, robust plants that can brighten up any garden.
Disease and Pest Management for Solidago rigida L. var. glabrata E.L. Braun
Solidago rigida L. var. glabrata E.L. Braun, commonly known as ‘Stiff Goldenrod’, is a hardy perennial plant that is generally disease and pest resistant. However, like all plants, it is still susceptible to certain diseases and pests under certain conditions. Here are some common diseases and pests that may affect the plant as well as some ways to manage them:
Common Diseases
Rust: Rust is a fungal disease that can cause yellow-orange spots on the leaves, which eventually turn brown and fall off. Infected plants have reduced growth, and in severe cases, the plant may completely defoliate and die. To manage rust, remove infected leaves and avoid wetting the leaves during watering to reduce the spread. Fungicides may also be used for severe cases.
Powdery Mildew: Powdery mildew is a fungal disease that appears as a white powdery coating on the leaves. Infected leaves may turn yellow and fall off. To manage powdery mildew, prune affected branches and leaves, ensure good air circulation around the plant, and avoid overhead watering. Fungicides may also be used for severe cases.
Leaf Spot: Leaf spot is a fungal disease that appears as black or brown spots on the leaves, which can cause defoliation. Infected leaves should be removed, and pruning may be needed to prevent overcrowding. Fungicides may also be used for severe cases.
Common Pests
Aphids: Aphids are small, pear-shaped insects that suck the sap from the leaves, resulting in yellowing and curling of the leaves. To manage aphids, remove them by hand or spray them with water. Beneficial insects, such as ladybugs and lacewings, can also provide control.
Spider Mites: Spider mites are tiny, eight-legged pests that feed on the plant’s sap, causing the leaves to become yellow and stippled. To manage spider mites, prune heavily infested branches, and spray the plant with an insecticidal soap or oil. Beneficial mites, such as the predatory mite, can also provide control.
Thrips: Thrips are very tiny, slender insects that feed on leaves, flowers, and stems. Infested leaves may curl and deform, and the flowers may fail to open properly. To manage thrips, remove affected flowers and spray the plant with an insecticidal soap or oil. Blue sticky traps can also be used to monitor thrips populations.
By implementing proper disease and pest management practices, gardeners can ensure that their Solidago rigida L. var. glabrata E.L. Braun plants remain healthy and thrive for many years.
