Growth Rate
Moderate: 'Double Knockout' roses have a moderate growth rate. They typically grow about 3 to 4 feet in height and spread per year under favorable growing conditions.
Size
Mature Height: Generally reaches a height of about 3 to 4 feet.
Mature Spread: Has a spread of approximately 3 to 4 feet as well, forming a compact and bushy habit.
Blooming
Flowering: Known for its prolific, continuous blooming from spring through fall. The flowers are double-petaled, typically bright red in color, and fade to a softer pink as they age.
Care Requirements
Sunlight: Requires full sun for optimal flowering, at least 6-8 hours of direct sunlight per day.
Soil: Thrives in well-drained, fertile soil with good organic content.
Watering: Regular watering, especially during dry periods, is essential to keep the soil consistently moist but not waterlogged.
Pruning: Pruning in early spring helps maintain its shape and encourage new growth and blooming.
Hardiness
Hardiness Zones: Hardy in USDA zones 5-10.