ILSE KROHN SUPERIOR® – white climbing rose – pharmaROSA® NEONATAL
Vertical installations and collection-focused projects can confidently build on ILSE KROHN SUPERIOR® as own-root propagation material for trained climber production, where reliable, snow-white flowers and an exclusive, space-defining presence are key. As a Hybrid Kordesii climber with medium maintenance needs and staked, trained 3–5 cane release form, it lends itself to structured nursery workflows and predictable 5–7 L finished-product routes for retail and reseller partners. Its H7 hardiness and Swedish Zone 4 rating support UK-wide production, including demanding northern and more exposed sites with good winter and wind tolerance, while own-root longevity underpins long-term stock blocks and cultivar maintenance. The remontant, clustered, high-centred blooms align well with exhibition climbing rose and cut-flower oriented ranges, strengthening professional credibility in thematic rose gardens and vertical feature projects. As a NEONATAL tray-grown rooted cutting, it fits easily into large-scale rose production, providing a uniform, renewable base that moves from root establishment in year one through structural shoot development in year two to full ornamental expression in year three, supporting stable capacity, reduced replacement risk and coherent collections across integrated nursery networks and public-realm supply. In this context, the cultivar can form a durable, high-value backbone for exclusive climbing assortments and curated show-garden lines.
Usage options
Finished-product ideas
- 5–7 L Premium Trained Climber – NEONATAL own-root plants finished as 3–5 cane trained climbers in 5–7 L pots, highlighting snow-white blooms and dense foliage for vertical garden feature assortments – retail and reseller programs.
- White Façade Feature Line – coordinated wall and façade climber range using uniform colour retention and reliable climbing structure for project-based supply, produced from stable own-root propagation beds – landscape and public-realm suppliers.
- Exhibition Climber & Cut Stem Concept – high-centred, double, clustered flowers trained on canes for both show benches and occasional cutting, aligned with the exhibition climbing rose category – specialist rose exhibitors and niche wholesalers.
- Thematic Collection Block Plant – own-root NEONATAL stock grown on for collection and show-garden plantings, leveraging long-term identity stability and H7 hardiness for curated white-rose sections – botanical and display gardens.
- Pergola & Arbour Signature Climber – trained climbers with dense foliage and vertical presence supplied as consistent batches for pergola and arbour structures, supporting exclusive, space-defining project briefs – garden centre concept ranges.
Technical cultivar profile
| Parameter |
Data |
| Name and registration |
Hybrid Kordesii climbing rose registered as Ilse Krohn Superior, marketed as Ilse Krohn Superior® climbing rose; exhibition category exhibition climbing rose (large-flowered, cut-suitable). |
| Origin and breeding |
Spontaneous mutation of ‘Ilse Krohn’ (Golden Glow × Rosa kordesii), bred by Reimer Kordes, W. Kordes’ Söhne, Klein Offenseth-Sparrieshoop, Germany, introduced and registered in 1964. |
| Growth and structural characteristics |
Climbing habit, 250–380 cm height and 170–240 cm spread, dense dark green slightly glossy foliage, moderately thorny canes, weak self-cleaning so spent blooms generally require manual removal. |
| Flower morphology |
Medium-sized, double, 26–39 petalled flowers, high-centred pointed-budded form, clustered inflorescences, remontant with an abundant second flowering phase, suitable for both display and some cutting. |
| Colour data and phenology |
Pure, uniform snow-white blooms, ARS W, RHS NN155D outer and NN155B inner; slightly translucent white when newly opened, very good colour retention with only slight browning on petal edges in strong sun. |
| Fragrance and aroma |
Mild, restrained scent with fresh character; double flowers limit access to stamens, so pollinator attraction is low and the variety functions primarily as a visual ornamental rather than a pollinator resource. |
| Hip characteristics |
Rose hips form sparsely due to the double flower form; when present they are spherical, orange, around 15–22 mm in diameter, and generally of minor ornamental significance in production planning. |
| Resistance and winter hardiness |
Medium resistance to powdery mildew, black spot and rust; hardy to approximately –26 to –23 °C, RHS H7, Swedish Zone 4, USDA 5b, tolerates heat well with watering in extended dry periods. |
| Horticultural recommendations |
Best used on walls, pergolas and arbours or for cut flowers; medium maintenance with regular pruning, feeding and pest monitoring; released as staked, trained 3–5 cane climber, recommended in 5–7 L containers. |
ILSE KROHN SUPERIOR® offers reliable climbing structure, long-lasting white bloom quality and hardy performance on a predictable, regenerative own-root base; please contact us to align capacity and scheduling for your nursery programmes.
