GRANDESSA – deep red climbing rose – Delbard
Climber production with GRANDESSA offers own-root stability for nurseries building exclusive, vertical-feature assortments where predictable structure and repeat value matter over decades; this dense-foliaged foliage type establishes a strong framework on pergolas, walls and fences from a staked, pre-trained 3–5 cane NEONATAL base, supporting efficient 5–7 L container routes and later upgrade into 40–50 litre landscape units for space-defining projects, while its remontant deep-red colour and cut-rose style flower form underpin a distinctive, collection-worthy feature profile that suits thematic rose gardens and curated public schemes in cooler UK regions with reliable winter tolerance and wind resilience, and under continuous propagation load the own-root system builds Year 1 roots, Year 2 shoots, and Year 3 full performance for homogeneous, low-replacement blocks that simplify scheduling, strengthen credibility with institutional buyers, and integrate smoothly into nationwide nursery supply logistics.
Usage options
Finished-product ideas
- Premium 5–7 L trained climber – NEONATAL-derived, staked 3–5 cane plants with established framework for pergolas, fences and walls, emphasising the deep-red colour stability and exclusive vertical feature positioning – retail and reseller climber programmes.
- 40–50 L landscape pergola unit – Step-up containers from 5–7 L with a fully formed climbing structure, exploiting own-root longevity and cold tolerance to serve long-term vertical garden feature roles – public-realm and institutional projects.
- Collection-line Delbard climber – Branded Delbard-origin SKU within a thematic rose garden collection, using uniform NEONATAL stock and trained climber routing to highlight breeding pedigree and distinctive flower form – specialist rose collections and show gardens.
- Mother-stock bed plants – Own-root plants grown on in nursery beds to supply cutting wood for ongoing propagation, capitalising on regeneration capacity and stable ornamental traits – nurseries maintaining vertical feature assortments.
- Exclusive retailer signature climber – Private-label, deep-red climber in 5–7 L with consistent training and medium-maintenance profile, positioned as a space-defining vertical feature – branded ranges for key retail and reseller partners.
Technical cultivar profile
| Parameter |
Data |
| Name and registration |
Registered as DELsire, traded as Grandessa Famille Delbard roses DELsire, with ARS exhibition name Messire Delbard; a climber in the large-flowered climber group, authenticated for professional own-root propagation. |
| Origin and breeding |
Bred by Georges Delbard in France in 1976 from Danse du Feu × Guinée and a complex pollen parent, introduced by Delbard in 1978, representing classic Delbard climbing rose breeding lines for structural and floral impact. |
| Awards and recognition |
Recognised in 1976 with a prize at Bagatelle and an International Rose Competition Prize at Geneva, indicating early appreciation of its ornamental and structural qualities in formal trial settings. |
| Growth and structural characteristics |
Creeping, climbing habit reaching about 200–330 cm in height and 120–200 cm spread, forming dense, glossy dark green foliage on densely thorned shoots, suitable for training on pergolas, walls and fences in managed systems. |
| Flower morphology |
Large, double, solitary blooms with 26–39 petals, high-centred and pointed-budded in a cut-rose style, providing a refined floral presentation on a climbing framework with remontant performance and a plentiful second flush. |
| Colour data and phenology |
Deep-red ARS DR, RHS 187B outer and 187A inner petals; buds blackish burgundy, opening ruby red and velvety, then maturing to a uniform deep red with fine black edging before fading to brownish burgundy with a matt finish. |
| Fragrance and aroma |
Displays a mild yet pleasantly noticeable scent, adding a subtle olfactory dimension without dominating nearby plantings; fragrance description is not fully characterised but offers an extra quality layer for close-up viewing areas. |
| Hip characteristics |
Produces moderate quantities of spherical hips, roughly 12–18 mm across, coloured bright red (RHS 40A), which can contribute seasonal interest and support ornamental value beyond the main flowering periods when left on the plant. |
| Resistance and winter hardiness |
Hardy to about −26 to −23 °C, corresponding to H7, Swedish zone 4 and USDA 5b; disease profile shows resistance to black spot with moderate sensitivity to powdery mildew and rust, fitting professional medium-input regimes. |
| Horticultural recommendations |
Best used on pergolas, fences and walls as a trained climber; recommended as a staked, trained 3–5 cane finished product in 5–7 L containers, with medium maintenance needs and occasional plant protection within professional systems. |
GRANDESSA Famille Delbard roses DELsire combines deep-red, award-recognised climber impact with hardy, own-root longevity and predictable structural performance, making it a solid option for aligning propagation capacity and project scheduling in your programme.
