Buddleja 'Royal Red' stands out with its purple-red flowers that bloom in summer and autumn, reaching up to 30 cm in length. Native to parts of East Asia, South America, and Africa. It has an arching growth habit, with branches bending under the weight of its flowers. Its leaves fall off in autumn. Also known as the "butterfly bush" because its flowers attract butterflies.

It blooms from June to October on current-year shoots. A typical feature is the orange "eye" in the center of each flower. Final height up to 2 m.

Easy to grow and undemanding. Plants bought in containers can be planted whenever the soil isn’t frozen (March to November). Grows best in fertile, well-drained, loamy-sandy soil that is slightly moist with near-neutral pH. Requires watering during drought.

Prefers sunny and warm locations. Not fully frost-resistant, so before winter, cover the base of the plant with soil, bark, sawdust, or leaves.

Grows quickly and may bloom abundantly even if the aboveground parts freeze in winter. During the growing season, fertilize 2–3 times with flowering plant fertilizer. In early spring, prune hard to about 20 cm above ground. This promotes branching and profuse flowering.