Japanese Astilbe 'Red Sentinel'

Scientific Name: Astilbe japonica 'Red Sentinel'

Common Name: Japanese Astilbe

Hardiness Zone: USDA Zones 4–9

Hardiness Degree: Tolerant to cold climates; suitable for zones 4 and above

Blooming Season: Early to mid-summer

Plant Habit: Clump-forming, upright

Characteristics: Features vibrant scarlet-red flowers held in open, lacy panicles; blooms in early to mid-summer; forest green foliage with mahogany-red stems; one of the best red astilbes

Water: Prefers consistently moist, well-drained soil; regular watering is essential, especially during dry periods

Fertilize: Apply a balanced, slow-release fertilizer in early spring; mulch can help retain soil moisture

Spacing: 18–24 inches (45–60 cm) apart

Height: Approximately 24 inches (60 cm)

Width: Approximately 18 inches (45 cm)

Exposure: Partial shade; tolerates full shade but may result in reduced flowering