Silphium radula
TAXONOMY
FamilyAsteraceae
GenusSilphium
Zone4
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Silphium radula, commonly known as Roughleaf Rosinweed, is a perennial plant in the Asteraceae family. It is native to the central United States and typically found in prairies and open woodlands. The plant has a dormancy period during the winter months and is known for its bright yellow flowers that attract pollinators.
ALSO KNOWN AS
Roughstem Rosinweed
Silphium radula var. radula
Silphium reverchonii
Silphium simpsonii var. wrightii
OVERVIEW
VPDCalculate
WaterMoist
SoilLoamy
LightDirect Bright (6 Hours)
Temperature20° C
Humidity50%
Dormancy3 Months
pH6.5
Pressure1,013 mbar
DETAILS
Care Instructions
Silphium radula thrives in temperate climates with moderate temperatures. It prefers full sun exposure and should be watered when the soil partially dries out. The plant can tolerate average humidity levels and should be protected from extreme cold.Soil
Silphium radula prefers well-draining loamy soil. It can tolerate a range of soil types but performs best in nutrient-rich, slightly acidic to neutral soil. Ensure good drainage to prevent waterlogging.Fertilizer
Use a balanced fertilizer with an N-P-K ratio of 10-10-10. Fertilize the plant during the growing season to promote healthy growth and flowering. Avoid over-fertilizing as it can lead to excessive foliage growth at the expense of flowers.Repotting
Repot Silphium radula every 2-3 years or when it outgrows its container. Choose a slightly larger pot with good drainage. Repot in early spring before the growing season begins.Propagation
Propagate Silphium radula through seeds or division. Sow seeds in early spring or divide mature plants in late fall or early spring. Ensure the divisions have adequate roots and replant them immediately.Pruning
Prune Silphium radula in late winter or early spring to remove dead or damaged stems. This encourages new growth and maintains the plant's shape. Deadhead spent flowers to promote continuous blooming.Toxicity
Silphium radula is not known to be toxic to pets or humans. However, it is always advisable to keep plants out of reach of pets and children to prevent accidental ingestion.REVOLUTIONIZE YOUR PLANT CARE
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