Senecio crassissimus, commonly known as Vertical Leaf Senecio or Propeller Plant, is a succulent perennial herb native to the rocky outcrops and arid regions of Madagascar. It typically grows up to 24 inches tall and 18 inches wide. The plant features thick, fleshy, blue-green leaves with purple margins, arranged oppositely on the stem, resembling an airplane propeller, hence its common name. The leaves exhibit phototropism, changing direction to minimize direct sun exposure and reduce moisture loss. Senecio crassissimus blooms from mid-summer to autumn, producing bright yellow, daisy-like flowers that are quite showy and attract pollinators.

The Propeller Plant is valued for its drought tolerance and unique foliage, making it an excellent choice for succulent gardens, xeriscaping, and as a container plant for patios and indoor settings. It thrives in full sun and requires well-draining soil to prevent root rot. Overwatering is a common issue, so it is important to let the soil dry out between waterings. While it is generally pest-resistant, mealybugs and aphids can sometimes be a problem. It is not cold-hardy and should be protected from frost.CC BY-SA 4.0