Paeonia delavayi subsp. lutea, commonly known as Yellow Tree Peony or Delavay’s Tree Peony, is a deciduous shrub native to the mountainous regions of Western China, particularly in Yunnan province. It is typically found in open woodlands and on sunny slopes, often at high altitudes. This species grows at a moderate rate to a height of 4-6 feet (1.2-1.8 meters) and a width of 4-5 feet (1.2-1.5 meters). The Yellow Tree Peony is characterized by its large, cup-shaped, yellow flowers that bloom in late spring to early summer, providing a showy display that is highly valued in gardens. The foliage is deep green, divided into leaflets, and provides a lush backdrop for the flowers.

The Yellow Tree Peony is appreciated for its striking flowers and is often used in ornamental plantings, as a specimen plant, or in mixed borders. It requires well-drained soil, preferably a loamy or clay substrate, and can tolerate part shade, though it flowers best in full sun. While it needs regular watering, especially during the growing season, it is relatively drought-tolerant once established. This plant is also known for its medicinal properties in traditional Chinese medicine. Gardeners should be aware that it can be susceptible to peony wilt and other fungal diseases, and it may require staking due to the heavy blooms.CC BY-SA 4.0