Silphium perfoliatum
TAXONOMY
FamilyAsteraceae
GenusSilphium
Zone4
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Silphium perfoliatum, commonly known as cup plant, is a perennial plant in the Asteraceae family. It is native to North America and is often found in prairies, meadows, and along stream banks. The plant is known for its large, opposite leaves that form a cup around the stem, which can collect rainwater. It produces bright yellow flowers and can grow up to 8 feet tall. The plant undergoes a dormancy period during the winter months.
ALSO KNOWN AS
Cup Plant
Resinocaulon perfoliatum
Silphium conjunctum
Silphium erythrocaulon
Silphium hornemannii
Silphium perfoliatum f. perfoliatum
Silphium perfoliatum subsp. perfoliatum
Silphium perfoliatum var. perfoliatum
Silphium petiolatum
Silphium quadrangulum
Silphium scabrum
Silphium tetragonum
OVERVIEW
VPDCalculate
WaterWet
SoilLoamy
LightDirect Bright (6 Hours)
Temperature20° C
Humidity60%
Dormancy4 Months
pH6.5
Pressure1,013 mbar
DETAILS
Care Instructions
Cup plant thrives in full sun and requires moderate temperatures. It prefers evenly moist soil and can tolerate a range of humidity levels. Regular watering is essential, especially during dry periods. The plant can be grown outdoors in temperate climates and does not do well indoors.Soil
Silphium perfoliatum prefers loamy soil that is well-draining yet retains moisture. The soil should be rich in organic matter to support its nutrient needs. It can tolerate a range of soil pH levels but thrives best in slightly acidic to neutral soil.Fertilizer
A balanced fertilizer with an N-P-K ratio of 10-10-10 is recommended. Fertilize the plant in early spring and again in mid-summer to support its growth and flowering. Avoid over-fertilizing as it can lead to excessive foliage growth at the expense of flowers.Repotting
Repotting is generally not required for cup plant as it is typically grown outdoors. However, if grown in a container, repot every 2-3 years to refresh the soil and provide more space for root growth. Repot in early spring before new growth begins.Propagation
Cup plant can be propagated by seeds or division. Sow seeds in the fall or early spring. For division, dig up the plant in early spring or fall and separate the root clumps. Replant the divisions immediately in prepared soil.Pruning
Pruning is beneficial for maintaining the plant's shape and encouraging more blooms. Cut back the stems in late fall after the plant has finished flowering. Remove any dead or damaged stems throughout the growing season to promote healthy growth.Toxicity
Silphium perfoliatum is not known to be toxic to pets or humans. However, it is always advisable to prevent pets and children from ingesting any plant material.Additional
Cup plant is known for its ability to attract pollinators such as bees and butterflies, making it a great addition to a pollinator garden. It can also provide habitat for birds and other wildlife. The plant's ability to collect rainwater in its leaf cups can help support local ecosystems.REVOLUTIONIZE YOUR PLANT CARE
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