Sunblest – Hybrid tea rose propagation material for premium container production
Colour stability, form precision and border versatility make Sunblest an attractive cultivar for nursery and integrator programmes focused on premium 5–7 L container production and cut-flower orientated ranges. Its remontant flowering delivers repeated, marketable flushes, while the upright habit and moderately dense foliage support bush-trained production with 3–5 strong canes for clean, specimen-quality plants. The intense golden-yellow blooms retain their appearance well with minimal fading, underpinning reliable retail presentation even under variable light, with performance that aligns well to regions where cold winters and wind exposure are routine conditions. Own-root propagation through the pharmaROSA® NEONATAL platform provides a stable, renewable base for long-term stock, supporting homogeneous stands, predictable capacity and reduced replacement over successive cycles. From year one root establishment, through year two structural build-up to full ornamental expression in year three, Sunblest can underpin exclusive finished-product lines and collection plantings for professional retail and wholesale partners.
Usage options
Finished-product ideas
- Premium 5–7 L exhibition bush – Upright, bush-trained plants in 5–7 L containers, selected for strong, solitary blooms and stable golden-yellow colour, positioned as an exclusive exhibition-grade hybrid tea for specialist retailers – target audience/channel: retail / reseller
- Cut-and-show mother-stock line – Field or container stock from own-root NEONATAL material, managed for remontant flowering and high-quality stems to feed in-house cut-flower and show-bloom programmes – target audience/channel: specialist cut-flower partners
- Golden border feature series – Coordinated production of Sunblest for border and specimen use, with consistent 5–7 L premium containers highlighting colour retention and structured habit for public and private show gardens – target audience/channel: public-realm project suppliers
- Yellow collection signature cultivar – Branded inclusion in curated yellow rose collections, using the name meaning and intense colour as the narrative focal point, supplied in uniform premium containers – target audience/channel: thematic and collection nurseries
- Park-edge and approach-planting unit – Medium-maintenance, upright bushes supplied as exclusive-grade finished plants for high-visibility park edges and approach plantings where flower form quality is specified – target audience/channel: landscape and municipal contractors
Technical cultivar profile
| Parameter |
Data |
| Name and registration |
Hybrid tea rose registered as Sunblest, with current trade use as Sunblest Hybrid tea rose Sunblest, recognised for exhibition as Sunblest by the American Rose Society. |
| Origin and breeding |
Bred by Mathias Tantau Jr. at Rosen Tantau, Germany, from an unknown seedling crossed with ‘King’s Ransom’, introduced and registered in 1970 as a commercial hybrid tea rose. |
| Awards and recognition |
Awarded Tokyo Gold Medal at the Japan Rose Concours in 1971 and both Gold Star of the South Pacific and National Rose Trial Ground Winner in New Zealand trials in 1973. |
| Growth and structural characteristics |
Upright bush growth, around 85–115 cm high and 55–75 cm spread, with moderately dense, mid-green, glossy foliage and moderate prickliness, forming a structured framework under bush training. |
| Flower morphology |
Large, double blooms with 26–39 petals, solitary on stems, cup-shaped with medium-height flowers, remontant with an abundant second flush supporting repeated ornamental and cutting value. |
| Colour data and phenology |
Intense golden-yellow blooms (ARS DY, RHS 14A/14B) with vivid sunlit buds; colour holds very well with only slight fading from bright lemon yellow to a creamy, buttery pale yellow over time. |
| Fragrance and aroma |
Primarily valued for visual impact; fragrance is very faint and barely noticeable, and the double flower form offers limited access to stamens, making it mainly an ornamental display cultivar. |
| Hip characteristics |
Occasionally forms small, spherical orange-red hips around 8–12 mm diameter, visually discreet but confirming pollination, with no significant commercial use in decorative or culinary applications. |
| Resistance and winter hardiness |
Classified to about -26 – -23 °C (USDA 5b, RHS H7, Swedish Zone 4), with moderate disease resistance to powdery mildew, black spot and rust, and moderate heat tolerance requiring regular watering. |
| Horticultural recommendations |
Suited to borders, cut-flower, specimen and park use, with medium maintenance and occasional pest and disease control; recommended as bush-trained plants for premium container production in 5–7 L pots. |
Sunblest offers upright, bush-trained structure, stable golden-yellow flower quality and robust winter hardiness on a predictable own-root base, making it a practical option to discuss for capacity planning and tailored scheduling.
