HORjasper – pharmaROSA® NEONATAL own-root climbing rose propagation material
Vertical cultivation with HORjasper provides a reliable, own-root foundation for nursery networks seeking distinctive, space-defining climbers for pergolas, walls and pillars in thematic rose gardens and curated collections. As a repeat-flowering rambler, it offers abundant cluster-flowered displays from tray-rooted, 3–6-month-old material that integrate efficiently into trained-climber production in 5–7 L containers. The vivid scarlet-red blooms with a white eye retain their colour very well, creating consistent, high-impact flowering surfaces that suit exclusive, speciality vertical garden features and retail-focused reseller ranges. Own-root production supports long-term longevity, regeneration and predictable stand structure under intensive propagation and cropping, helping to stabilise capacity planning and minimise replacement in wholesale stock-building. In UK nursery conditions, its heat and drought tolerance allows confident scheduling even in warmer, more exposed sites, with dependable performance under summer pressure and exposed vertical positions in production and project plantings. Disease management does require a professional protection programme due to its susceptibility, but this is offset by its self-cleaning habit, which maintains ornamental impact with minimal manual deadheading on production benches and in display areas. As a high-profile climber with multiple UK trial awards, it fits premium, branded or private-label ranges where proven garden performance and recognisable trial credentials support confident retail specification. Across its development arc from year-one root establishment through year-two framework building to full ornamental expression from year three onward, its dense, glossy foliage and strong climbing habit help deliver the vertical structure and colour curtains required in show gardens and public-realm features, while own-root stability underpins long-term maintenance and re-supply.
Usage options
Finished-product ideas
- 5–7 L trained climber for retail arches – Own-root, staked 3–5 cane plants with dense foliage and strong climbing habit, finished in 5–7 L pots to create ready-to-install vertical features for arches and small pergolas – retail / reseller.
- Award-backed pergola climber line – Gold Standard and RHS AGM branding highlight trial performance, combined with repeat flowering and vivid, colour-stable blooms for a premium pergola series supplied as trained climbers – branded retail ranges.
- Collection-grade vertical feature stock – Own-root NEONATAL material grown on into structurally reliable plants forms a long-term framework for thematic collections and show gardens, emphasising distinctive vertical habit and foliage quality – public and institutional gardens.
- Project-ready vertical screen modules – Heat-tolerant, dense-foliaged climbers pre-grown on supports for rapid deployment on walls and fences, based on own-root stability for predictable, long-lived screening – public-realm and landscape contracts.
- Specialist managed-care climber assortment – Curated for growers with strong plant protection capability, offering high ornamental impact, repeat flowering and exclusive vertical character in a technically managed, own-root climber range – specialist rose nurseries.
Technical cultivar profile
| Parameter |
Data |
| Name and registration |
Repeat-flowering rambler, registered as HORjasper, marketed as Horjasper Climbing rose HORjasper and Rambling Rosie in exhibitions; classified within the climbing rose commercial and exhibition groups. |
| Origin and breeding |
Raised by Colin P. Horner in the United Kingdom from Super Excelsa × (Baby Love × Golden Future); bred 2001, introduced and registered in 2005, with Warner’s Roses as initial UK distributor. |
| Awards and recognition |
Gold Standard Award 2007, RHS Award of Garden Merit 2012, Glasgow Rose Trials Golden Prize 2010 and Hague Rose Trials Bronze Certificate 2010, supporting its use in premium, verified assortments. |
| Growth and structural characteristics |
Climbing habit reaching 3.0–5.0 m high with 1.0–2.2 m spread, dense dark green glossy foliage and abundant prickles, suited to training on walls, fences, arches, pillars and pergolas with staked main canes. |
| Flower morphology |
Semi-double, flat, small flowers (about 0.5–1.5 in) in clusters, with 13–25 petals, remontant with an abundant second flush, and good self-cleaning as most faded petals fall away naturally from the trusses. |
| Colour data and phenology |
Intense scarlet-red blooms with a white eye; ARS MR, RHS 46A outer and 46B inner; colour fades to carmine-red and almost white centre while retaining very good overall colour value across flowering stages. |
| Fragrance and aroma |
Very faint rose scent, barely perceptible; semi-double clustered blooms with partially accessible stamens offer occasional, moderate pollinator interest but are not optimised for maximum pollinator attraction. |
| Hip characteristics |
Produces moderate quantities of small, spherical hips around 6–10 mm in diameter, ripening to orange-red and adding a discrete seasonal feature without significantly affecting flowering performance. |
| Resistance and winter hardiness |
Hardy to about −21 to −18 °C (H7, Swedish zone 3, USDA 6b); heat and moderate drought tolerance are good, but disease resistance is weak with moderate mildew and black spot and high rust susceptibility. |
| Horticultural recommendations |
Best used as a wall, fence, pergola, arch, pillar or container climber; maintenance requirement is high, with regular plant protection needed, ideally supplied as a staked, trained climber from 5–7 L containers. |
HORjasper offers a proven award-backed climber with strong vertical growth, dense foliage and vivid, repeat-flowering displays on a long-lived own-root base that supports predictable, regenerative stands; we would welcome discussing alignment on volumes and scheduling.
