CARDINAL HUME – lilac-purple park rose – Harkness
Step through your front gate and be met by plum billows of CARDINAL HUME, a classic British park rose reimagined for today’s smaller, rain-aware gardens. Its bushy, slightly spreading habit quickly creates a softly rounded shrub that thrives even where space is tight, lending an easy sense of structure to London terraces and family plots. Medium-sized, cupped blooms open rich crimson then age through smoky, lilac-purple shades, so each cluster offers several tones at once, extending the feeling of abundance for months. Bred for excellent disease resistance, this is a genuinely low-input choice, ideal where humidity and summer showers test more delicate varieties and where you need a rose that shrugs off wind and wet with reassuring reliability. As an own-root plant, it builds strength from below, quietly forming a durable framework that promises a long, stable lifespan with minimal intervention. Container-grown in a 2-litre pot, it slips easily into clay or chalk soils improved for drainage, or into generous containers on balconies and small front gardens. In its first year it focuses on roots, in the second on shoots, and by the third it reveals its full ornamental character, rewarding patient, low-effort care with rich colour and a soft, muscat-like fragrance that mingles beautifully with cool evening air.
Usage options
| Target area |
Reasoning |
| Front-garden feature shrub |
The bushy, slightly spreading habit forms a generous mound that quickly reads as a focal point beside a path or bay window, giving structure without dominating a small plot; ideal for time-poor homeowners seeking impact from one reliable plant for front-garden enthusiasts |
| Low-maintenance flowering hedge |
Planted at hedge spacing, CARDINAL HUME knits into a loose, flowering boundary with minimal pruning, its good disease resistance allowing a relaxed regime while still looking cared for; well suited to families wanting screening and colour with very little upkeep for busy households |
| Rain-aware urban planting strip |
This rose copes well with showery, breezy conditions, making it useful along pavements or shared front plots where runoff collects and weather is changeable, supporting greener, more permeable streetscapes with dependable flowering for urban gardeners |
| Own-root long-term garden anchor |
As an own-root shrub, it regrows faithfully if cut back by weather or renovation, avoiding suckering from incompatible rootstock and providing steady ornamental value over many years, reassuring those who want to plant once and enjoy for long-term planners |
| Season-long colour backbone |
Remontant flowering and an abundant second flush keep beds lively well beyond early summer, while multi-toned clusters add depth even between peak flushes, supporting borders that look engaging from school term to autumn half term for colour lovers |
| Medium-sized container or large pot display |
In a 40–50 litre or larger planter with good drainage, this variety creates a substantial yet manageable presence on balconies, shared front steps or roof terraces, offering rose-garden romance where planting into the ground is impossible for balcony owners |
| Partial-shade side return or north-east aspect |
Its tolerance of partial shade allows planting in side passages or between buildings where sun hours are limited, still delivering fragrance and blossom, so overlooked corners contribute to the garden’s overall sense of welcome for shade-challenged gardeners |
| Beginner-friendly, low-intervention rose choice |
Robust disease resistance and moderate self-cleaning reduce spraying and deadheading, and it is forgiving of typical UK clay or chalk once drainage is improved, giving newcomers confidence with a shrub that thrives on simple, regular watering for new gardeners |
Styling ideas
- TerraceWelcome – Underplant CARDINAL HUME with lavender and low nepeta to soften a narrow London terrace frontage, using gravel between planting pockets for discreet rainwater soakaway – ideal for sustainability-minded homeowners.
- EveningCorner – Combine this rose with purple sage and dark-leaved heucheras near a bench, letting the muscat-like scent and smoky blooms anchor a calm evening nook – perfect for relaxation-seeking city dwellers.
- SoftHedge – Create a loose hedge along a front boundary, interplanting with ornamental grasses such as Stipa tenuissima to move in the wind and echo the rose’s shifting purple tones – suited to families wanting gentle privacy.
- CottageLayer – Place CARDINAL HUME mid-border with foxgloves behind and low geraniums in front to build a tiered, cottage-style effect that looks full for much of the season – good for beginners craving traditional charm.
- BalconyFeature – Grow a single shrub in a 50-litre pot with trailing thyme and sedums to spill over the rim, making a compact, drought-conscious composition that still feels luxurious – great for small-space balcony gardeners.
Technical cultivar profile
| Characteristic |
Data |
| Name and registration |
Shrub rose marketed as CARDINAL HUME – lilac-purple park rose – Harkness; registered as HARregale, belonging to the Park – shrub rose group, suitable for garden and landscape use. |
| Origin and breeding |
Bred by Jack Harkness, R. Harkness & Co. Ltd. in the United Kingdom, introduced and registered in 1984; complex parentage involving Rosa californica and several garden roses for vigour and colour. |
| Awards and recognition |
Recipient of an RNRS Certificate of Merit in 1984, reflecting strong garden performance and ornamental value under UK trial conditions soon after its introduction to the market. |
| Growth and structural characteristics |
Forms a bushy, slightly spreading shrub 80–130 cm high and 120–200 cm wide, moderately thorny, with dense, dark green, slightly glossy foliage giving good ground cover and presence in beds. |
| Flower morphology |
Produces medium-sized, cupped, double blooms with 26–39 petals in clustered inflorescences; remontant habit with notably abundant second flush, some self-cleaning but benefits from light deadheading. |
| Colour data and phenology |
Buds open deep crimson, then rich reddish-crimson; full blooms dark mauve-purple with smoky tones, later dull purplish-brown with silvery lilac; ARS Mau, RHS 60A outer, 61A inner, colour deeper in cooler weather. |
| Fragrance and aroma |
Medium-strength perfume with a soft, muscat-like character; noticeable around the plant in still conditions, especially in the evening or on cool, humid days, adding sensory interest without being overpowering. |
| Hip characteristics |
Occasionally forms small, spherical scarlet hips 8–13 mm across; decorative in autumn where present, though not typically a major feature compared with foliage and repeat flowering. |
| Resistance and winter hardiness |
Rated resistant to powdery mildew, black spot and rust; hardy to approximately −21 to −18 °C (RHS H7, USDA 6b, Swedish zone 3), tolerating UK winters and moderate heat with regular watering in drought. |
| Horticultural recommendations |
Best in well-drained but moisture-retentive soil; tolerates clay or chalk once improved. Plant 130–210 cm apart depending on hedge or specimen use, and consider 40–50 litre containers for robust potted specimens. |
CARDINAL HUME brings long-season lilac-purple colour, a soft muscat fragrance and durable, own-root reliability to compact family gardens and terraces, a thoughtful choice if you would like a quietly impressive, low-effort shrub rose.
