Russelia equisetiformis aka Firecracker Plant

Russelia equisetiformis typically grows 2–4 feet tall (up to 5 feet in optimal tropical conditions) and spreads 3–5 feet wide, forming a rounded, fountain-like mound. Its arching stems give it a graceful weeping habit that makes it well suited to cascading over walls, hanging baskets, or container edges.

Russelia equisetiformis is native to Mexico and Guatemala in Central America. It has been widely introduced as an ornamental across the continental United States (particularly in warm-climate states), the Caribbean, and many tropical and subtropical regions worldwide.

Russelia equisetiformis is a tender tropical plant that does not tolerate frost well. NCSU and most horticultural sources state it should not be left outdoors below 41 °F (5 °C). Wikipedia cites one source suggesting it can briefly withstand down to −6 °C (21 °F), but this conflicts with the dominant horticultural guidance — treat it as frost-sensitive and bring it indoors or provide protection once temperatures approach freezing.

In USDA zones 9–11, Russelia equisetiformis requires minimal seasonal intervention and will bloom almost year-round. In cooler climates, bring container plants indoors before the first frost and place them in a bright spot with direct sunlight. Alternatively, cut stems back hard and store the plant cool, dry, and dark over winter, then return outdoors in spring. Once spring arrives, cut overwintered stems to near soil level to encourage fresh, vigorous growth.

The flowers of Russelia equisetiformis are small, tubular, and typically bright scarlet-red, borne in drooping terminal clusters (cymes) along the arching stems. Individual blooms are roughly 1–3 inches long. Color variants exist in white, yellow, pale orange, and various shades of red. The profuse flowering along every stem gives the whole plant the appearance of a fountain of fire.

Russelia equisetiformis is available in several flower color forms including the classic red, as well as white, yellow, pale orange, and other shades of red. No widely standardized named cultivars were identified in the sources reviewed.

Russelia equisetiformis is primarily an outdoor plant suited to USDA zones 9–11. It is salt tolerant, making it suitable for coastal gardens. It thrives in full sun with well-drained soil and is drought tolerant once established. It works well as a landscape specimen, in containers, in hanging baskets, and cascading over walls. Shelter from strong wind is recommended to protect the arching stems. It is a known hummingbird and butterfly attractor.

For plants overwintered indoors, cut stems back to near soil level in spring before returning the plant outdoors. This encourages fresh, vigorous growth. Hard cutback is also used as part of cool, dry winter storage. Light trimming throughout the growing season can help maintain the fountain shape.

Russelia equisetiformis propagates most easily from stem cuttings. Arching stems will also root naturally when they come into contact with soil, providing a simple layering method without any intervention.

No serious insect or disease problems have been recorded for Russelia equisetiformis. It is considered a low-maintenance plant in this regard.

Russelia equisetiformis is valued primarily as an ornamental plant. It is used in garden borders, containers, hanging baskets, and as a groundcover or cascading accent over walls. Its tubular flowers are a reliable food source for hummingbirds and butterflies, making it a popular choice for wildlife gardens.