DIAMANT® – white groundcover rose – KORgazell
Coverage driven production with DIAMANT® supports dense, uniform groundcover for UK project schemes where low-maintenance, mass planting is essential and heat- and wind-exposed sites are common, while its compact, spreading habit and dark, glossy foliage help nurseries deliver visually finished, bush-trained 1.5–2 L lines for landscape contractors. The snow-white, semi-double flowers provide clean, repeat ornamental value in park and urban planting, with ADR-level resistance backing predictable crop performance and reducing replacement in nursery beds. As own-root pharmaROSA® NEONATAL material, DIAMANT® offers a stable propagation base that moves from root establishment through structural framework to full ornamental expression over three seasons, supporting reliable scheduling for project-focused wholesale ranges.
Usage options
Finished-product ideas
- 1.5–2 L project groundcover line – Own-root, compact, spreading plants with dense, glossy foliage and fast coverage, grown as uniform, bush-trained 1.5–2 L stock for project mass planting schemes – landscape contractor / project-serving wholesaler
- Premium white urban series – DIAMANT® as a white, remontant, disease-resistant element in a curated urban shrub range, supplied in 1.5–2 L pots for parks and streetscapes requiring durable, low-maintenance groundcover – urban green space supplier
- Large 40–50 L coverage units – Scaled-up specimens with established, spreading canopies and dense foliage, offering near-instant ground coverage for corporate, hotel or civic entrances where fast visual impact and reliability are key – premium landscape nursery
- Thematic white collection blocks – Uniform batches for white-themed beds within rose or colour collections, using DIAMANT®’s stable snow-white bloom and compact habit to create consistent, easily replicated modules – thematic rose garden supplier
- Stock-bed and mother-plant rows – Own-root rows in nursery ground or containers, exploiting ADR-level resistance and long lifespan to provide a stable, renewable propagation and reference base for future project-focused production – collection-focused propagator
Technical cultivar profile
| Name and registration |
Groundcover/shrub rose registered as KORgazell, marketed as Diamant® Rigo Roses® KORgazell; garden shrub rose exhibition type with ARS name Diamant, positioned as a white groundcover commercial rose. |
| Origin and breeding |
Bred by Wilhelm Kordes III. (W. Kordes’ Söhne, Germany) in 1992, registered 1999 and introduced 2001; parentage unknown, supplied here as pharmaROSA® NEONATAL own-root propagation material for professional production. |
| Awards and recognition |
Gold medal Kortrijk Rose Trial 2001, ADR rating Germany 2002, bronze National Rose Trial Garden of Australia 2003, first prize Hradec Králové 2005, plus further international award recognition in subsequent rose trials. |
| Growth and structural characteristics |
Spreading, compact habit reaching about 45–80 cm height and 50–90 cm spread, with dense, dark green, glossy foliage and moderate prickliness; designed for continuous, low groundcover and visually coherent shrub canopies. |
| Flower morphology |
Semi-double, flat, medium-sized flowers (approximately 1.5–2.75 inches) in clusters, with 13–25 petals; remontant character ensures abundant first and second flushes, enhancing seasonal coverage across beds and borders. |
| Colour data and phenology |
Pure, uniform snow-white colour (ARS Wh, RHS 155C outer, 155D inner), porcelain buds opening to clean discs with little fading; generally retains whiteness, though petal edges may brown slightly in strong, prolonged sun. |
| Fragrance and aroma |
No noticeable fragrance; scentless profile directs value towards visual effect, structural coverage and resilience, making it suitable where colour and uniform habit matter more than olfactory impact in planting specifications. |
| Hip characteristics |
Produces moderate quantities of small, spherical red hips about 6–10 mm diameter, offering some seasonal extension of interest without significantly altering the primary role as a dense, flowering groundcover shrub. |
| Resistance and winter hardiness |
Rated resistant to powdery mildew, black spot and rust; hardy approximately to −21 to −18 °C (USDA 6b, Swedish zone 3, RHS H7), with good heat tolerance when irrigated, supporting reliable performance in varied UK climates. |
| Horticultural recommendations |
Suitable for groundcover, flower beds, borders, parks and urban green spaces; low maintenance with minimal pruning. Recommended as uniform, dense, bush-trained finished stock in 1.5–2 L pots for project mass planting routes. |
DIAMANT® leverages compact, fast ground coverage, dense glossy foliage and strong disease resistance on a predictable own-root base to support durable, uniform project plantings; please contact us to coordinate volumes, lead times and specification support.
