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Hides in the shade… but steals the show 🎭
Family: Saxifragaceae · Pot diameter: 12cm · Height: 25cm
Heuchera ‘Boysenberry’ lays out a soft mosaic of mahogany and ripe berry shades, as though its foliage had caught the warmest light of an autumn afternoon. Rounded leaves ripple gently at the edges and overlap one another, letting small pockets of shadow deepen their colour. Above this velvety surface, fine flowering stems and tiny white flowers introduce an airy counterpoint without disturbing the plant’s quiet, richly textured presence.
This is a plant that gives a composition depth without raising its voice. Beside silver leaves, soft gold and natural stone, the mahogany looks richer and the ruffled edges take on an almost fabric-like texture. A small repeated group along a path can draw the garden’s separate brushstrokes together into a warm, considered picture.
Deep colour, a soft outline and delicate white flowers rising above low foliage.
Reddish-brown and purple shades give rounded leaves depth, with variations according to their age and the light.
The lobed leaves lift and ripple at their edges, creating overlapping layers rather than a flat sheet of colour.
Fine flowering stems rise above the foliage, usually from June to August, depending on the climate.
Why you will love it: it brings the warmth of a dark textile to a border and lets neighbouring pale foliage shine.
Place it in front of taller perennials, beside a partially shaded path or in a pot that does not overheat in the afternoon. For a small group, allow approximately 40–45cm between plant centres so the leaves can meet without crowding their bases.
In cool, humus-rich soil that drains freely, combine rounded mahogany foliage with fine lines and lighter surfaces.
Bright partial shade or gentle morning sun. In hot summers, avoid scorching afternoon exposure.
Water as the surface begins to dry, keeping a little moisture deeper down. Excess water must drain freely.
Cold hardy at RHS H6 (−20 to −15°C). This rating applies to established plants in the ground, not unprotected small pots.
An ornamental plant, not food. Keep it away from pets that chew foliage and do not encourage consumption.
Choose open partial shade with morning light. Deep shade can make the mound look looser, while heat combined with strong afternoon sun may damage leaf edges.
Check the soil before watering rather than following the calendar alone. Water at the base until moisture reaches deeper roots and empty the saucer. Pots need more frequent checks during a heatwave.
Use humus-rich, moderately fertile soil with good drainage. Keep the crown, where the leaf stalks originate, level with the surface rather than burying it under heavy soil or thick mulch.
A thin spring dressing of well-rotted compost is usually sufficient in a border. In a pot, use a light perennial feed according to its label, avoiding excessive nitrogen or application to completely dry growing medium.
Remove damaged outer leaves in spring, cutting their stalks near the base without injuring new growth. After flowering, cut away the spent flower stems.
Much of the foliage remains in mild winters, while severe cold can damage more leaves. In spring, check whether frost has lifted the crown and carefully restore it to the correct level.
Allow about 20–30cm in foliage height and 35–40cm in spread, with flower stems reaching approximately 40–50cm. The mound fills out gradually during its early years, according to site and cultivation.
New lobed leaves unfold from the basal rosettes and gradually cover older outer foliage.
The low mahogany mound fills out, while fine flower sprays add a second, much airier layer above it.
Growth slows. Retained leaves preserve the basic shape, although a severe winter may leave the plant looking thinner until spring.
Mature foliage stays low, approximately 20–30cm high and 35–40cm wide. Rounded lobes and gently ruffled edges are held on stalks rising from the base; during flowering, the fine flower sprays reach approximately 40–50cm.
The drawings distinguish the leafy base from the added flower stems. The intensity of mahogany and the number of leaves vary naturally through the year.
What to expect after planting: Roots establish first, followed by an increase in basal rosettes. Leaves and flowers sit at different heights: the slender flower stems do not turn this low mound into a tall shrub.
In April 2010, at Heerhugowaard in the Netherlands, breeder Jelle van den Haak crossed one of his unnamed proprietary Heuchera selections as the seed parent with Heuchera ‘Crimson Curls’ as the pollen parent. This controlled cross produced a new generation of seedlings, from which the future ‘Boysenberry’ would emerge.
Selection followed in July 2011, also at Heerhugowaard. One plant stood out for its combination of reddish-brown to mahogany foliage, ruffled leaf surface and compact habit. That individual seedling became the starting point of the cultivar named ‘Boysenberry’, which joined the Indian Summer collection.
In March 2013, asexual propagation of the selected plant began through tissue culture at Andijk. Repeated propagation showed that its distinctive characteristics remained consistent in subsequent generations of plants. On 24 October 2017, US plant patent USPP28575 was granted.
Asexual propagation preserves the selected plant’s genetic combination. Sexual reproduction, by contrast, recombines genes; a seedling is therefore not necessarily another ‘Boysenberry’, even when its seed came from this cultivar.
Six useful answers about Boysenberry’s colour, flowering and seasonal behaviour.
Not exactly. Leaf age, light and temperature alter the intensity of reddish-brown and purple shades without changing the cultivar’s identity.
Usually from June to August, with timing shifting according to the climate. Fine flower sprays stand above the low leafy mound.
It is semi-evergreen. Much of the foliage remains in mild winters, while prolonged cold can cause greater leaf loss before spring renewal.
Yes, in a freely draining pot with room for a mound about 35–40cm wide. Avoid persistent root overheating and water left standing in a saucer.
You can leave them while they are flowering. Once dry, cut them near the base without damaging leaves or new rosettes.
Do not automatically add more water. Check drainage, the crown and root condition: wet soil does not always mean that the roots are functioning well.
