PROF. KOWNAS – orange hybrid tea rose – Żyła
Professional growers looking to build distinctive, long-lived hybrid tea ranges can use PROF. KOWNAS as a premium own-root propagation base, combining an upright, compact habit with dense, glossy foliage and medium maintenance needs. The double, exhibition-type blooms are refined in form, with solitary, medium-sized orange flowers that hold their colour well, gradually softening into salmon and pastel-gold tones ideal for exclusive finished lines. Own-root production supports predictable regeneration and uniform stands over time, fitting nursery and container workflows where Year 1 roots, Year 2 vegetative build-up and Year 3 full ornamental value can be planned into scheduling. With RHS H7 hardiness at -29–-26 °C, it offers reliable garden performance even in cooler, exposed UK sites where winter and wind can be demanding, while tray-rooted pharmaROSA® NEONATAL material is straightforward to handle into 5–7 L premium containers and larger 40–50 litre feature specimens for thematic rose gardens and curated collections focused on cut flower quality and form.
Usage options
Finished-product ideas
- 5–7 L premium hybrid tea bush – Upright, compact, bush-trained plants with dense, glossy foliage and solitary orange blooms, grown in 5–7 L pots as an exclusive, flower-form-led SKU – target: branded retail and reseller ranges.
- Exhibition-cut container line – Own-root bushes selected for straight, flower-carrying stems and refined, double blooms, offered in 5–7 L containers as garden-based cut-flower stock – target: specialist rose and exhibition-focused outlets.
- 40–50 L feature specimen – Mature, own-root plants trained from rooted cuttings into 40–50 litre containers for immediate border or specimen impact, leveraging hardiness and dense foliage – target: landscape contractors and public-realm projects.
- Thematic orange collection piece – PROF. KOWNAS used as the orange focal cultivar within curated hybrid tea collections, supplied from uniform 5–7 L containers to highlight name, story and flower form – target: show gardens and thematic rose displays.
- Own-root mother block starter set – pharmaROSA NEONATAL rooted cuttings established as a dedicated cultivar-maintenance block, capitalising on hardiness and regeneration to feed ongoing premium container production – target: propagation nurseries and integrator systems.
Technical cultivar profile
| Parameter |
Data |
| Name and registration |
Hybrid tea rose cultivar PROF. KOWNAS (Żyła), commercial hybrid tea rose group; trade name used for garden and exhibition purposes, no separate registered name data provided. |
| Origin and breeding |
Bred by Stanisław Żyła from (Crepe de Chine × Marina) × Rinacor; breeding company and initial distributor not provided, with introduction recorded in 1996 and registration in 1994. |
| Awards and recognition |
No competition, collector, or global awards are recorded for this cultivar; selection is based primarily on horticultural and ornamental characteristics rather than formal distinctions. |
| Growth and structural characteristics |
Upright habit, 70–95 cm high and 40–55 cm spread, with dense, dark green, glossy foliage and moderate prickliness; spent blooms tend to remain on the plant and require manual deadheading. |
| Flower morphology |
Medium-sized, 1.5–2.75 inch double flowers with 26–39 petals; solitary, cup-shaped blooms that open fairly flat, offering refined hybrid tea presentation suited to borders and cutting. |
| Colour data and phenology |
Bright orange with a subtle golden tinge (RHS 24A outer, 23B inner); colour retention is good, with blooms slowly fading through salmon-rose to pastel-gold tones toward senescence. |
| Fragrance and aroma |
Mild, pleasant floral fragrance of subtle intensity; the double, fully filled blooms limit pollen access, so pollinator attraction is low and not a primary feature of this cultivar. |
| Hip characteristics |
Hip set is generally low due to double flowers; when formed, hips are spherical, orange-red, around 12–17 mm diameter, and do not significantly influence ornamental performance. |
| Resistance and winter hardiness |
Moderate disease resistance with good black spot resistance and moderate susceptibility to mildew and rust; hardy to -29–-26 °C (RHS H7), suited to Swedish Zone 4 and USDA Zone 5a climates. |
| Horticultural recommendations |
Best used as border, cut-flower or specimen plant; medium maintenance with occasional plant protection and deadheading required, ideal for premium container production from own-root, bush-trained stock. |
PROF. KOWNAS offers hardiness, refined orange hybrid tea blooms and a compact, bush-trained habit on predictable own-root stock, making it a practical candidate for aligning premium container capacity and long-term nursery scheduling in your range planning.
