Petal Pals
shrub · 2026
Orange Glow Knock Out
Rosa 'Radslam'
4.5 ft
Height
Continuous
Blooming
Full sun
Light
4–11
Zone
Plant & Flower Traits
Rose type
shrub
Bloom habit
Blooms repeatedly from spring to frost in clusters.
Petal count
25 petals (double)
Flowering
continuous
Habit
bushy
Color
orange
Fragrance
none
Foliage
Green
Fragrance Notes
very slight
Color Description
Luminous orange with yellow and pink undertones
🌱 Growth & Garden Habits
Light
Full sun
Height
4.5 ft
Spread
3 ft
Soil
Well-drained soil
Hardiness Zone
Zone 4–11
Disease Resistance
Excellent disease resistance, specifically noted for rust resistance.
🌿 Care Guide
Watering
moderate
Fertilizer
A single spring feeding is generally sufficient.
Pruning
Prune once a year in late winter by cutting the plant back by about a third to maintain shape and vigor.
Pests & Diseases
Exceptional disease resistance
🏆 Awards & Recognition
2026 American Rose Center International Rose Trials People’s Choice Award