Martine Guillot™ Générosa® – MASmabay rooted cutting
Martine Guillot™ offers premium own-root propagation material for professional producers requiring reliable, collection-grade shrub roses in UK nursery and landscape supply chains. Its romantic flower character, strong sweet fragrance and remontant, double blooms support high-value, exclusive finished product concepts in the nostalgia segment, particularly for premium container routes in 5–7 L and upwards to 40–50 litre display formats. The upright, bushy habit with dense, mid-green foliage enables structured border and specimen production, with low maintenance needs and stable disease resistance helping to keep replacement rates down in long-term stock beds. Own-root, tray-grown cuttings from the pharmaROSA® NEONATAL platform provide a predictable base for nursery propagation beds and integrator systems, supporting thematic rose garden and collection projects where identity and continuity matter. Over time, the development arc naturally progresses from root establishment in year one, to structural framework in year two and full ornamental expression by year three, providing a sustainable backbone for rose-led ranges that must also tolerate cooler, wind-exposed conditions typical of Scottish and northern English sites. This supports wholesale partners seeking dependable, large-scale shrub rose supply.
Usage options
Finished-product ideas
- Générosa® Premium Container 5–7 L – Upright, bushy shrubs in 5–7 L pots, bush-trained with 3–5 framework canes, showcasing large, double, fragrant white blooms; positioned as exclusive nostalgia roses for high-end retail / reseller assortments – target audience/channel: retail / reseller
- Romantic Feature Tub 40–50 L – Individually staked shrubs in 40–50 litre containers for entrances, terraces and show-garden focal points, leveraging hardy performance and strong fragrance within an exclusive, flower-quality-led concept – target audience/channel: public‑realm suppliers
- Nostalgic Border Line – Row-grown shrubs for borders and specimen use, selected for hardy, disease-resistant performance and low maintenance, marketed as a premium romantic white border rose within curated ranges – target audience/channel: landscape contractors
- Own-Root Stock & Collection Block – Densely planted, labelled stock beds built from NEONATAL cuttings, supporting renewable cutting harvest and long-term cultivar maintenance in Romantic/Générosa® collections – target audience/channel: public‑realm suppliers
- Fragrant Shrub-Cut Dual Use – Shrubs grown in premium containers with spacing and framework optimised both for retail sale and occasional cutting of long, fragrant stems for local floristry and event use – target audience/channel: retail / reseller
Technical cultivar profile
| Parameter |
Data |
| Name and registration |
Registered cultivar MASmabay, marketed as Martine Guillot™ Générosa®, Romantic nostalgia shrub; ARS exhibition name Martine Guillot, shrub rose and cut flower exhibition categories. |
| Origin and breeding |
Bred by Dominique Massad in France (1991) from ‘New Dawn’ × ‘Graham Thomas’, introduced 1997 by Roseraies Pierre Guillot / Guillot, combining classic shrub character with romantic bloom form. |
| Growth and structural characteristics |
Upright, bushy shrub reaching around 140–220 cm in height and spread, with dense, slightly glossy mid-green foliage and moderate prickliness, forming a strong framework for border, specimen and container use. |
| Flower morphology |
Large, double, cup-shaped blooms with 26–39 petals on clustered inflorescences of 1–3 flowers per stem; remontant habit with abundant second flush, moderate self-cleaning requiring some deadheading in production. |
| Colour data and phenology |
Off-white overall with a very pale pink veil; buds cream to pink-edged, opening ivory with creamy yellow–pink centre, then pure white with soft powder-pink base and finally creamy white, with petal edges browning in strong sun. |
| Fragrance and aroma |
Strong, long-lasting sweet floral fragrance typical of romantic shrub roses; highly ornamental but limited pollinator access due to very double form and partially concealed stamens, mainly suited to aesthetic plantings. |
| Hip characteristics |
Rose hip formation generally slight, with occasional small spherical hips around 6–10 mm diameter in orange-red tones, of minor ornamental relevance in standard production cycles and display schemes. |
| Resistance and winter hardiness |
Hardy to approximately -21 to -18 °C (RHS H7, Swedish zone 3, USDA 6b) with resistance reported to powdery mildew, black spot and rust; moderate heat and drought tolerance, requiring irrigation in prolonged dry periods. |
| Horticultural recommendations |
Recommended for borders, specimens, cut flower and park planting; premium container route with 5–7 L target pot, supplied bush-trained with 3–5 strong canes; low maintenance needs suit professional, large-scale programmes. |
Martine Guillot™ Générosa® as pharmaROSA® NEONATAL rooted cutting combines hardy, disease-resistant shrub performance with romantic, fragrant blooms on a long-lived own-root base, making capacity and scheduling discussions worthwhile for professional programmes.
