Petal Pals
hybrid tea · 1971
Adolf Horstmann
Rosa 'Adolf Horstmann'
80 cm - 150 cm (approx. 3 - 5 ft)
Height
Repeat
Blooming
Full sun
Light
6–10
Zone
Plant & Flower Traits
Rose type
hybrid tea
Bloom size
Large, typically 12 - 13 cm (4.5 - 5 inches) in diameter.
Bloom habit
Large, fully double, high-centered blooms that open into a peony-like shape. Flowers are usually borne on long, sturdy stems suitable for cutting.
Petal count
30 to 55 petals
Flowering
repeat blooming
Habit
upright
Color
pink
Fragrance
very strong
Foliage
Dark green
Foliage surface
Glossy and leathery
Fragrance Notes
A rich, sweet perfume with distinct notes of raspberry and classic rose.
Color Description
A stunning blend of rich burnished gold and lemon yellow, with the outer petals often featuring a salmon-pink or peach flush.
🌱 Growth & Garden Habits
Light
Full sun
Height
80 cm - 150 cm (approx. 3 - 5 ft)
Spread
60 cm - 100 cm (approx. 2 - 3.5 ft)
Soil
Thrives in moist, well-drained loamy soil with a neutral to mildly alkaline pH between 6.6 and 7.8.
Hardiness Zone
Zone 6–10
Disease Resistance
Average to good; noted for being quite hardy and healthy, though can struggle with black spot in specific climates.
🌿 Care Guide
Watering
Water deeply and regularly, typically once a week or more frequently in hot, dry conditions. Avoid overhead watering to prevent foliage diseases.
Fertilizer
Apply a balanced rose fertilizer (such as 5-5-7) in early spring and again after the first flush of blooms to support continuous flowering.
Pruning
Prune in late winter or early spring before new growth begins. Remove dead, damaged, or diseased wood and thin out older canes to promote vigorous new growth, as it blooms on new wood.
Pests & Diseases
Susceptible to black spot and mildew in humid conditions; also prone to aphids and spider mites.
🧬 Pedigree
'Colour Wonder' × 'Dr. A.J. Verhage'
🏆 Awards & Recognition
RNRS Trial Ground Certificate (1972), New Zealand Certificate of Merit (1973).