Silphium asteriscus var. trifoliatum (L.) Clevinger , commonly known as whorled rosinweed, is a species of flowering plant in the family Asteraceae. It is native to the eastern United States, where it is found east of the Mississippi River. Its natural habitat is open, grassy areas such as prairies, river cobble bars, and roadsides. It is a tall perennial that produces heads of yellow flowers in mid-summer through fall.
Whorled rosinweed has strong disease resistance and is generally not prone to illnesses. Still, it can be vulnerable to pests and diseases that exist in its environment. Such infections are typically mild. Regarding care, this plant needs a moderate level of maintenance. It should be pruned regularly to preserve a neat appearance and encourage healthy growth. Applying fertilizer can also help boost flowering. Whorled rosinweed is appropriate for anyone with outdoor space, like a garden or patio, and does not demand extensive gardening experience. It may need more attention when kept indoors.
How to keep Silphium Trifoliatum.
Light
Whorled rosinweed is a sun-loving, perennial herbaceous plant native to open habitats and commonly found thriving in meadows and grasslands. It favors full sun exposure but can also tolerate partial sun conditions.
Temperature
Whorled rosinweed can tolerate a wide range of temperatures, though its distribution may still be limited by various combinations of water and heat. It does best in warm summer climates with adequate rainfall or watering. Prolonged stretches of cloudy, rainy weather, as well as extended high temperatures, raise the chance that Whorled rosinweed will die. In winter, providing proper protection from cold can improve the plant's survival rate.
Fertilizer
Early spring, when a Whorled rosinweed is coming out of dormancy and beginning active growth, is the best time to apply fertilizer. Fertilizing supplies essential nutrients for healthy development. Although Whorled rosinweed has fairly low fertilizer requirements, an annual application can improve its survival and encourage better, longer-lasting blooms.
Botanical profile.
- Plant Type
- Herb
- Life Cycle
- Perennial
- Genus
- Silphium
- Family
- Asteraceae
- Hardiness Zone
- 5-9
- Mature Height
- 2.13 m
- Mature Spread
- 91 cm
- Leaf Color
- Green, Dark Green
- Leaf Type
- Deciduous
- Flower Color
- Yellow
- Flower Size
- 5.08 cm to 7.62 cm
- Bloom Time
- Summer
- Planting Time
- Spring, Summer, Autumn
- Harvest Time
- Late summer, Early fall, Mid fall
