Summer Heat Peruvian Lily

Summer Heat is a tall, clump-forming Peruvian lily with red flowers and a bright yellow central flare. Its summer-to-fall bloom, sturdy stems, and long-lasting cut flowers suit sunny borders and mixed perennial beds. ## Garden character and placement The Proven Winners selection grows about 3–3½ feet tall and 2½–3 feet wide, with upright green foliage. Give it full sun to part sun and room for its mature clump; it can also be used in a large container. The official profile lists USDA zones 6a–9b and notes that established plants have overwintered in Zone 6, especially with well-drained soil and winter protection. ## Growing conditions Choose fertile soil that drains freely and stays moderately, consistently moist through active growth. This cultivar emerges later than many perennials, then grows quickly once shoots appear. Its large flowers and extended bloom can attract bees, butterflies, and hummingbirds. The [Proven Winners profile](https://www.provenwinners.com/plants/alstroemeria/summer-heat-peruvian-lily-alstroemeria-hybrid) identifies the plant as Alstroemeria hybrid 'Tessumheat' and provides its cultivar-specific size, season, and siting guidance. The [RHS Alstroemeria guide](https://www.rhs.org.uk/plants/alstroemeria/growing-guide) provides general advice on drainage, stem support, overwintering young plants, and pulling spent stems from the base once established. ## Maintenance Allow the clump to establish without unnecessary disturbance. Water during dry spells, particularly while it is flowering; maintain drainage through winter and consider a protective mulch in colder sites. Remove spent flowering stems from the base to tidy the planting and make room for new growth.