WILLIAM LOBB – deep purple historic moss rose - Laffay
With its richly textured mossy buds and deep, shifting purple blooms, William Lobb brings old-world romance straight into your front garden while staying surprisingly manageable. Once established, this historic shrub rose forms a tall, upright, slightly arching bush that carries clusters of large, double rosette flowers in a moody crimson-purple that soften to smoky, greyish-lilac tones, echoing Irish cottage-garden charm even where Atlantic winds and damp weather are part of daily life. The strong, long-lasting fragrance drifts across paths and seating areas, making every flowering day feel special. Supplied as a 6–12 month, own-root plant in a 2-litre pot, it settles in reliably, building roots in year one, shoots and shape in year two, and full ornamental value by year three, so You can simply plant it, keep it watered and enjoy an increasingly impressive, long-lived shrub. Use one as a dramatic centrepiece or a small group for a generous, romantic hedge that frames your garden and matures into a distinctive feature with minimal fuss once properly established, yet with enough character and heritage appeal to satisfy more experienced rose lovers as well as curious beginners seeking something truly special.
Use cases
| Target area |
Reason |
| Front garden focal point |
Tall, upright, slightly arching growth and large, double, crimson-purple flowers create an immediate focal point near your doorway or front boundary, ideal where you want instant character that builds year after year for beginners |
| Romantic cottage-style hedge |
Planted at 110 cm intervals, the dense, thorny, mossy stems knit into a protective flowering hedge with a single, dramatic summer flush, well suited to cottage-style boundaries that echo rural Irish lanes for homeowners |
| Small group in mixed border |
A group of 1–3 plants at 120 cm spacing anchors a mixed border, combining the rich purple-lilac flowers with perennials like anemone or coneflower for continuous interest while the shrub itself offers a stable, long-lived backbone for planners |
| Seasonal scented feature near seating |
The strong, full-bodied fragrance rewards a spot beside a bench or terrace, turning a once-blooming summer display into a memorable seasonal highlight that becomes more abundant as the plant matures from year one roots to year three display for sensualists |
| Heritage rose collection corner |
As a historic moss rose introduced in 1855, William Lobb adds authentic heritage value and interest, especially for those who appreciate old varieties with a story and a proven garden merit record for collectors |
| Partial-shade side path |
Suited to partial shade, it works well along side paths or north-east facing walls where many modern roses struggle, bringing colour and scent into those slightly cooler, gentler light conditions common in Irish gardens for realists |
| Deep, well-drained large container (40–50 litres) |
In a minimum 40–50 litre pot with good drainage, it forms a tall, dramatic container specimen; the own-root habit lets it adapt gradually to pot culture, provided watering and feeding are kept consistent for balconies |
| Coastal or exposed rural garden |
Once established in well-drained soil, the robust shrub structure copes with cool, humid conditions and breezy, rain-laden air, fitting Irish gardens where persistent moisture and wind are part of normal weather for families |
Decorating ideas
- Cottage Gateway – Train William Lobb as a loose, arching pair either side of a front gate, underplant with lavender and catmint to soften the prickly stems – ideal for lovers of classic cottage entrances
- Moody Purple Border – Use one shrub as the tall anchor in a mixed border, weaving in dusky salvias, dark heucheras and pale foxgloves for contrast – perfect for gardeners who enjoy dramatic, atmospheric colour themes
- Heritage Rose Corner – Combine with old-fashioned pink and white shrub roses plus hardy geraniums to form a “heritage nook” visible from the kitchen window – suited to collectors and story-driven gardeners
- Scented Seating Nook – Position near a simple bench, with soft grasses and Anemone ‘Fantasy Belle’ to extend interest as the rose finishes flowering – great for those who value a single, intense scented season
- Large Pot Statement – Grow it in a 40–50 litre terracotta or half-barrel container with trailing thyme and ivy at the base to dress a sunny doorstep – ideal for small urban gardens needing strong vertical impact
Technical cultivar profile
| Characteristic |
Data |
| Name and registration |
Moss rose group, historical shrub type. Trade name William Lobb – deep purple historic moss rose – Laffay; ARS exhibition name William Lobb. Unregistered cultivar, male given-name reference. |
| Origin and breeding |
Historic French moss rose, bred by Jean Laffay and introduced circa 1855. Parentage recorded as moss rose seedling, descendant of ‘Gloire des Mousseux’. Distributed originally by Jean Laffay. |
| Awards and recognitions |
Holder of the Royal Horticultural Society Award of Garden Merit since 1993, indicating reliable garden performance, ornamental value and recognised merit under typical garden conditions. |
| Growth and structure |
Upright, slightly arching shrub reaching around 150–230 cm high and 100–160 cm wide. Foliage moderately dense, dark green with slight gloss. Stems and buds are densely thorned and mossy, giving strong texture. |
| Flower morphology |
Large, double rosette blooms, 2.75–3.95 inches across, produced in clusters. Petal count 26–39, giving a full, old-rose look. Not remontant; provides a single, concentrated flowering period in early to mid-summer. |
| Colour and phenology |
Closed buds dark violet-purple; freshly opened flowers deep crimson-purple with pink-lilac sheen. Blooms mellow to smoky greyish-lilac, centre silvery in strong light. Colour retention medium, can fade faster in hot sun. |
| Fragrance and aroma |
Strong, long-lasting perfume with a full-bodied, rich character typical of heritage moss roses. Best appreciated near paths or seating. High ornamental scent value, especially during peak flowering flush. |
| Rose hip characteristics |
Occasional ovoid hips, 14–22 mm diameter, red-orange (RHS 40A). Develop after successful pollination if spent blooms are left in place, adding modest late-season interest and wildlife value. |
| Resistance and hardiness |
Very hardy to about -29 to -32 °C (USDA 4b, RHS H7, Swedish zone 5). Disease resistance moderate to weak: medium susceptibility to powdery mildew and black spot, very susceptible to rust; needs regular monitoring. |
| Horticultural recommendations |
Best in deep, fertile, well-drained soil; avoid prolonged drought. Allow space: 120 cm for mass planting, 110 cm for hedging, 180 cm as solitary. Suited to partial shade. Deadhead and prune to manage weak self-cleaning. |
WILLIAM LOBB offers tall, dramatic heritage flowers, strong fragrance and long-lived, own-root reliability that gradually settles into your garden with character; consider it if You want a distinctive, classic shrub that will reward patient care over time.
