Petal Pals
climber · 1966
Altissimo
Rosa 'Altissimo'
7-15 feet
Height
Continuous
Blooming
Full sun
Light
5–11
Zone
Plant & Flower Traits
Rose type
climber
Bloom size
4-5 inches
Bloom habit
Single, saucer-like flowers borne in small clusters.
Petal count
5-7 petals
Flowering
continuous
Habit
vigorous
Color
red
Fragrance
slight
Foliage
Dark green
Foliage surface
Glossy, leathery
Fragrance Notes
Occasionally described as having a very light, cloves-like scent, though often noted as having little to no fragrance.
Color Description
Large, velvety, blood-red single blooms with prominent deep golden-yellow stamens.
🌱 Growth & Garden Habits
Light
Full sun
Height
7-15 feet
Spread
4-8 feet
Soil
Prefers humus-rich, fertile, moist, and well-drained soil. Tolerates chalky, clay, loamy, and sandy soil types.
Hardiness Zone
Zone 5–11
Disease Resistance
Excellent resistance to common rose diseases like blackspot and mildew.
🌿 Care Guide
Watering
Regular watering; requires moist but well-drained soil. Avoid overhead watering to prevent disease.
Fertilizer
Fertilize regularly throughout the growing season with a balanced rose food.
Pruning
Prune lightly in spring. Deadhead regularly to encourage continuous blooming. Cut back all dead and two-year-old canes to the ground in early spring, leaving last year's growth.
Pests & Diseases
Generally very disease resistant, but can be susceptible to glasshouse red spider mite in certain conditions.
🧬 Pedigree
'Tenor' x Unnamed seedling
🏆 Awards & Recognition
Royal Horticultural Society (RHS) Award of Garden Merit 1993; National Rose Society (NRS) Certificate of Merit 1965.