COLONIAL WHITE® – white climbing rose – pharmaROSA® NEONATAL
Vertical planting projects and collection-focused ranges benefit from COLONIAL WHITE® as a climber with dense, glossy foliage, long canes and very double snow-white rosettes supported by a strong, tea-like fragrance. Delivered as pharmaROSA® NEONATAL own-root material, it offers a stable, renewable base for trained climber production on pergolas, trellises and arches where low maintenance and good disease resistance are commercially relevant. The rooted cuttings adapt well to UK nursery systems with reliable winter hardiness, supporting nationwide supply, even where colder, wind‑exposed sites require dependable performance in a coastal-influenced climate. With a trained, staked release form and a 5–7 L target pot for the first market step and scope to shift selected stock into 40–50 L premium presentation, the cultivar fits exclusive, space-defining vertical feature lines. Year 1 focuses on rooting strength, Year 2 on structural framework, and by Year 3 the full ornamental value is ready for retail and project demand.
Usage options
Finished-product ideas
- 5–7 L trained climber for arches – Own-root, staked material with 3–5 main canes offers a ready-to-place vertical feature in compact 5–7 L pots, combining white rosettes and strong fragrance for exclusive pergola and arch ranges – retail / reseller premium lines.
- 40–50 L signature pergola column – Up‑potted, pre-trained plants in 40–50 L containers provide instant structural impact with dense foliage and reliable hardiness, ideal as space-defining focal pieces – design-led landscape and public-realm projects.
- Fragrance collection wall panel – Coordinated batches grown on trellis frames emphasise the strong tea-like scent and repeat flowering, enabling curated fragrance garden modules – specialist nurseries and thematic rose garden contractors.
- White heritage-inspired climber series – Positioning the cultivar within a parentage-story range leverages its ‘New Dawn’ × ‘Mme Hardy’ background and authentic identity as a vertical feature – heritage estates, show gardens and collection managers.
- Cut-and-display vertical feature – Production focused on large, very double white rosettes allows growers to promote cutting potential alongside structural trellis use, adding value to vertical garden offers – independent garden centres and boutique resellers.
Technical cultivar profile
| Parameter |
Data |
| Name and registration |
Current trade name COLONIAL WHITE® Climbing rose, American Rose Society exhibition name Sombreuil, large-flowered climber in the Climbing rose collection; product identifier [976] 21-083 for pharmarosaneonatal.co.uk. |
| Origin and breeding |
Originating in the United States around 1940 from the cross ‘New Dawn’ × ‘Mme Hardy’; registration recorded in 2006, with later introduction to market via Roses of Yesterday and Today, breeder and company data not provided. |
| Growth and structural characteristics |
Vigorous climbing habit with 260–470 cm height and 150–270 cm spread, forming dense, glossy dark green foliage on moderately thorny canes; spent blooms persist and require manual deadheading due to weak self-cleaning. |
| Flower morphology |
Very double, rosette-shaped blooms with over 40 petals, large flower size of approximately 2.75–3.95 inches, borne in clusters; remontant with a well-performing, abundant second flush, suitable for decorative and cutting use. |
| Colour data and phenology |
Warm off-white base with silky sheen; ARS code W, RHS 155D outer and 155C inner; buds creamy-white with slight greenish tinge, newly opened flowers snow-white with faint rosy centre; colour holds well, fading only slightly creamy. |
| Fragrance and aroma |
Strongly scented variety with a warm, tea-like fragrance profile and delicate citrus notes; highly ornamental but not considered pollinator-friendly because the very double flower form restricts access to nectar and pollen. |
| Hip characteristics |
Produces moderate numbers of ellipsoidal red hips, approximately 9–16 mm in diameter, adding discreet seasonal interest without dominating the visual effect of the white rosette flowers on the plant. |
| Resistance and winter hardiness |
Rated resistant to powdery mildew, black spot and rust; hardy to around -21 – -18 °C, corresponding to RHS H7, Swedish zone 3 and USDA 6b; tolerates summer heat with regular watering under prolonged dry conditions. |
| Horticultural recommendations |
Suited to pergolas, trellises, arches, specimen uses, cut flowers and fragrance gardens; low general maintenance, best supplied as staked, trained 3–5 cane climbers in 5–7 L, with scope for up‑potting to larger statement containers. |
COLONIAL WHITE® combines strong fragrance, reliable hardiness and low-intervention disease resistance in an own-root form that supports predictable, long-lived vertical stocks; we would welcome a discussion to align capacity and scheduling to your programmes.
