Seymeria cassioides — a medium houseplant, prefers partial sun light
SPECIMEN · FROM THE LIBRARY
Seymeria cassioides

Seymeria Cassioides

Updated · 4 observations
ON THIS PLANT

Seymeria cassioides, commonly called yaupon black-senna or senna seymeria, is a species of annual forb found in North America. It is a species of obligate hermiparasite found on various species of pine.

A note from PlantMom

Yaupon blacksenna has strong disease resistance and is generally unlikely to suffer from illnesses. Nonetheless, it can be affected by pests and diseases found in its environment. Such infections are typically not serious. Regarding care, this plant needs a moderate amount of attention. It should be pruned regularly to preserve a neat appearance and encourage healthy growth. Applying fertilizer can also help boost flowering. Yaupon blacksenna is well suited for anyone with outdoor space, like a garden or patio, and does not demand extensive plant-care experience. It may need more attention if grown indoors.

— PlantMom
CARE GUIDE

How to keep Seymeria Cassioides.

Light

Yaupon blacksenna comes from habitats with filtered light, such as forest understories or rocky spots that provide natural shade. It performs best in partial sun but can also tolerate full-sun conditions.

Water

Yaupon blacksenna thrives in moist, well-drained conditions and needs to be watered twice a week to maintain consistent moisture. Although it can tolerate brief dry spells, it grows best outdoors where it can benefit from rainwater, which supports its natural growth and overall health.

Temperature

Yaupon blacksenna is fairly adaptable to temperature, tolerating higher heat and wider temperature fluctuations. In hot conditions, attention should be paid to watering and suitable shading to avoid sunburn. On the other hand, Yaupon blacksenna is less tolerant of low temperatures. It can endure some cold, but overly freezing conditions may cause frost damage.

Fertilizer

Yaupon blacksenna benefits from regular, light applications of fertilizer to encourage healthy leaf growth. Fertilize Yaupon blacksenna roughly once a month during the summer. Nitrogen is important for foliage, and adding nitrogen-rich sources helps Yaupon blacksenna prosper.

Pruning

Yaupon blacksenna thrives when properly pruned between early and late spring. Using techniques like light thinning can improve the plant's shape and remove deadwood, which in turn enhances air circulation, allows better light penetration, and encourages new growth. Be careful not to over-prune, as it can cause stress and reduce the plant's resilience.

CHARACTERISTICS

Botanical profile.

Plant Type
Herb
Life Cycle
Annual
Genus
Seymeria
Family
Orobanchaceae
Hardiness Zone
6-9
Mature Height
0.91 m to 1.83 m
Mature Spread
20 cm to 40 cm
Leaf Color
Green, Dark Green
Leaf Type
Semi-evergreen
Flower Color
Yellow
Flower Size
1.02 cm to 2.03 cm
Bloom Time
Mid summer, Late summer, Early fall
Planting Time
Spring, Summer
Harvest Time
Early fall, Mid fall
Native Area
Bahamas
ALSO KNOWN AS

Other names.

en Yaupon black-senna en Yaupon blacksenna en Senna seymeria en Smooth seymeria
PLATES
Seymeria cassioides leaf
PLATE 01 · leaf
Seymeria cassioides flower
PLATE 02 · flower
Seymeria cassioides habit
PLATE 03 · habit
ALSO IN THE LIBRARY

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