INKARHO Lime-tolerant Rhododendrons

These are the plants which we have featured in our recent RHS Chelsea Flower Show exhibits, with extensive reporting on the BBC Chelsea TV programme. Interest from new customers around the country has been exceptional, and gardeners have been delighted to learn that they can now grow their favourite plants on most garden soils.

The revolutionary new "Inkarho" lime tolerant rootstock is particularly recommended for growing Rhododendrons on neutral clay soils, up to pH7. This patented rootstock was developed from a Rhododendron growing in a German lime quarry, and has been the subject of an extensive 20 year breeding and testing programme. These plants are grown under licence in Germany, and enable choice hardy hybrids and yakushimanum varieties to be grafted on the rootstock and grown in a much wider range of soil types than ever before. They are hungry plants and require more feeding than other Rhododendrons to keep their foliage a healthy dark green. We recommend our own recipe Millais slow release fertilizer and plenty of good Ericaceous compost for best performance.

Please note that some of these plants are broader than they are in height, and that the specimen sizes (eg 90-100cm) are measured by the larger of the height or width.

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Dwarf Rhododendron Bloombux INKARHODwarf Rhododendron Bloombux INKARHO
Dwarf Rhododendron Bloombux INKARHO
(H6) NEW. A wonderful flowering alternative to troublesome box hedging! Lots of clusters of soft pink flowers in June. The plant responds well to trimming after flowering. Height 50-75cm in 10 years. Easy to grow in most soils. This superb new variety was raised by the INKARHO syndicate as 'Microhirs3' with PBR Plant Breeders Rights. It is suitable for growing on most garden soils, from very...
from £5.95
Rhododendron (yak) Anuschka INKARHO
Rhododendron (yak) Anuschka INKARHO
Now available on the Inkarho rootstock! Striking bright red buds open to gorgeous rosey pink flowers in late May. A lovely very hardy yakushimanum hybrid that has attractive dark green foliage. Height 75-100cm in 10 years. Plant with plenty of good ericaceous compost to aid establishment. Recommended for: Tough and reliable variety. Easy to grow. Ideal position: Most garden situations. Habit:...
from £31.95

Rhododendron (yak) Kalinka INKARHORhododendron (yak) Kalinka INKARHO
Rhododendron (yak) Kalinka INKARHO
Now available on the Inkarho rootstock! This lovely plant is red in bud, opening to ruby pink flowers with ruffled darker edges. It fades to pale rose pink with greenish yellow spots in May. It has a compact habit and dark shiny leaves with thin brown indumentum on the underside. Height 100cm in 10 years.Plant with plenty of good ericaceous compost to aid establishment. Ideal for containers and...
from £31.95
Rhododendron (yak) Lupinenberg Laguna INKARHORhododendron (yak) Lupinenberg Laguna INKARHO
Rhododendron (yak) Lupinenberg Laguna INKARHO
(H6) NEW and now available on the Inkarho rootstock! Purple buds open to deep mauve flowers with green yellow speckling, in late May. An excellent neat and compact growing plant, and one of the deepest mauve yakushimanum hybrids. Bred in Northern Germany, and very hardy to -20°C. Height 75-100cm in 10 years. Also known as Bohlken's Lupinenberg Laguna. Lupinenberg translates to 'Lupin Mountain'....
£31.95

Rhododendron (yak) Schneekrone AGM INKARHO
AGM
Rhododendron (yak) Schneekrone AGM INKARHO
Now available on the Inkarho rootstock! Beautiful white flowers tinged soft pink and spotted ruby red, in a ball shaped truss. Flowering in May we think this is one of the best white yaks (compact Rhododendrons) for cold climates. Height 80-100cm in 10 years. The English translation is Snow Crown, and it certainly has a majestic flower! Plant with plenty of good ericaceous compost to aid establishment. Recommended...
£31.95
Rhododendron (yak) Sonatine INKARHO
Rhododendron (yak) Sonatine INKARHO
Red in bud, opening to deep pink flowers, with a slightly creamy and speckled centre. Flowering from mid to late May, this is a tough plant from Hachmann's in Northern Germany. Lovely dark green leaves with a thin silvery grey indumentum on the undersides. Height 100-125cm in 10 years. Plant with plenty of good ericaceous compost to aid establishment. Ideal for containers and small gardens. Easy...
£125.00

Rhododendron Azurro INKARHORhododendron Azurro INKARHO
Rhododendron Azurro INKARHO
Now available on the Inkarho rootstock! Distinctive frilly edged purple flowers with a darker blotch. This stunner flowers in late May to early June. It is a very tough plant with a great compact habit. We are very keen on this plant because it has proven to be even more reliable than it's parent, Purple Splendour. Height 150cm in 10 years.Plant with plenty of good ericaceous compost to aid establishment. Recommended...
£31.95
Rhododendron Belkanto INKARHO
Rhododendron Belkanto INKARHO
(H6) Yellow orange buds opening to pale yellow flowers with wavy edges, tinged pale yellowish-pink with green spotting on the upper lobe, in a ball-shaped truss of 14-17. May flowering. Medium green slightly curved foliage, on a plant with a broad compact habit, and growing to a height of 125-150cm in 10 years. • Recommended for: Neat habit, yellow flowers• Easy to grow.• Ideal position:...
£31.95

Rhododendron Bellini INKARHO
Rhododendron Bellini INKARHO
Now available on the Inkarho rootstock! This is a good tough yellow from Northern Germany with soft pale yellow flowers, and dark red markings on the upper lobe, flowering in mid May. Height 125-150cm in 10 years.Plant with plenty of good ericaceous compost to aid establishment. Recommended for: Tough and reliable variety. Easy to grow. Ideal position: Most garden situations. Habit: Dense. Group:...
£31.95
Rhododendron Blaue Jungs INKARHO
Rhododendron Blaue Jungs INKARHO
Deep mauve blue flowers with a prominent chocolate blotch on the upper lobe. Mid to late May flowering. A very tough plant and striking plant from Germany. Height 150-175cm in 10 years. A tough plant which translates to 'Blue Guys' in English. Plant with plenty of good ericaceous compost to aid establishment. Recommended for: Hedging/screening. Easy to grow. Ideal position: Most garden...
£31.95

Rhododendron Brigitte INKARHO
Rhododendron Brigitte INKARHO
Now available on the Inkarho rootstock! Very pretty pale pink flowers with a darker pink edge in late May and early June. This plant has fine shiny foliage and has a compact habit, growing wider than tall. Height 100-120cm in 10 years.Plant with plenty of good ericaceous compost to aid establishment. Recommended for: Pretty flowers and good foliage. Easy to grow. Ideal position: Most garden situations,...
£595.00
Rhododendron Calsap INKARHO
Rhododendron Calsap INKARHO
Lovely large trusses of pinky white flowers with a prominent blackberry coloured blotch. A very striking flower in late May with pale green foliage on a plant with a neat habit. It does perform best in a sunny situation. Height 150-175cm in 10 years. Plant with plenty of good ericaceous compost to aid establishment. Recommended for stunning flower. Easy to grow. Ideal position: Most garden situations,...
£79.95

Rhododendron Catawbiense Boursault INKARHO
Rhododendron Catawbiense Boursault INKARHO
(H7) Long lasting lilac purple flowers with few markings. Late May flowering in a dense truss. A vigorous, very tough old variety, dating from before 1850, and hardy to -30C. Height 175-200cm in 10 years. Plant with plenty of good ericaceous compost to aid establishment. Recommended for: Hedging/screening. Easy to grow. Ideal position: Most garden situations. Habit: Dense. Group: Hardy Hybrid. Tolerant...
from £375.00
Rhododendron Constanze INKARHO
Rhododendron Constanze INKARHO
Now available on the Inkarho rootstock! Lovely rose pink flowers, paler in the throat, with wine red spotting on upper lobe. Flowering in late May this is a very hardy plant from Hachmann's Nursery in Northern Germany which grows wider than high. Height 140 -160cm in 10 years. Registered name is Hachmann's Constanze.Plant with plenty of good ericaceous compost to aid establishment. Recommended...
from £31.95

Rhododendron Cunningham' s White INKARHORhododendron Cunningham' s White INKARHO
Rhododendron Cunningham' s White INKARHO
Now available on the Inkarho rootstock! Mauve buds open to white flowers with a pale yellow eye in early May. With delicate small flowers, it is a very tough dense plant which is good for screening and difficult positions. Height 140-160cm in 10 years.It certainly ranks as one of our favourites for dense hedging and screening. If you have a difficult position this tough plant will perform well. Plant...
£31.95
Rhododendron Dufthecke Lilac INKARHO
Rhododendron Dufthecke Lilac INKARHO
Available on the Inkarho rootstock! Lilac purple in bud, opening to lilac but will fade paler. Flowering in April-May. It has fragrant flowers on a plant of neat compact growth with attractive shiney leaves. Height 125-150cm in 10 years. This one is ideal for hedging and screening. The German translation of Dufthecke is fragrant hedge! Plant with plenty of good ericaceous compost to aid establishment. Recommended...
from £125.00

Rhododendron Dufthecke Rose INKARHO
Rhododendron Dufthecke Rose INKARHO
Available on the Inkarho rootstock! Deep pink in bud opening to attractive pale pink flowers in early May. It has fragrant flowers on a plant of neat compact growth with attractive shiney leaves. Height 125-150cm in 10 years. This one is ideal for hedging and screening. The German translation of Dufthecke is fragrant hedge! Plant with plenty of good ericaceous compost to aid establishment. Recommended...
from £125.00
Rhododendron Dufthecke White INKARHO
Rhododendron Dufthecke White INKARHO
Available on the Inkarho rootstock! Intense lilac in bud, opening to creamy-white flowers with a pale rose-lilac edging. The beautifully scented flowers change gracefully to icy white in April-May. It has nice glossy pale green leaves on a plant of neat compact growth. Height 125-150cm in 10 years.This one is ideal for hedging and screening. The German translation is fragrant hedge! Plant with plenty...
from £79.95

Rhododendron Dufthecke Yellow INKARHO
Rhododendron Dufthecke Yellow INKARHO
Available on the Inkarho rootstock! Lovely yellow flowers that are slightly scented change gracefully to a delicate creamy colour in May. It has nice glossy pale green leaves on a plant of neat dense compact growth. Height 125-150cm in 10 years. This one is ideal for hedging and screening. The German translation is fragrant hedge! Plant with plenty of good ericaceous compost to aid establishment. Recommended...
from £31.95
Rhododendron English Roseum INKARHO
Rhododendron English Roseum INKARHO
Now available on the Inkarho rootstock! Attractive mauvey pink flowers in May-June on a very useful easy to grow plant. It tolerates heat and cold and is a dense and vigorous grower that can get very large. An ideal plant for hedging and screening. A reliable plant for difficult places. Height 180cm in 10 years.Plant with plenty of good ericaceous compost to aid establishment. Recommended for: Hedging/screening. Easy...
£31.95

Rhododendron Germania INKARHO
Rhododendron Germania INKARHO
Now available on the Inkarho rootstock! This is an outstanding plant introduced from Hobbie in Germany, with huge buds opening to deep pink flowers in a large upright truss during late May. It has an excellent habit, is tough and has large pale green rounded leaves. Tends to grow wider than it is tall. Plant with plenty of good ericaceous compost to aid establishment. Recommended for: Striking...
£31.95
Rhododendron Goldprinz INKARHORhododendron Goldprinz INKARHO
Rhododendron Goldprinz INKARHO
Now available on the Inkarho rootstock! From Hachmann's in Germany - translated in English to Gold Prince. This plant has deep yellow flowers and we love it. The orange red buds open to golden yellow flowers with deep red spotting and an attractive blotch. Height 75-90cm in 10 years. Also known as 'Goldschatz' (or Gold Treasure). Plant with plenty of good ericaceous compost to aid establishment. Ideal...
£31.95

Rhododendron Gomer Waterer AGM INKARHORhododendron Gomer Waterer AGM INKARHO
AGM
Rhododendron Gomer Waterer AGM INKARHO
Now available on the Inkarho rootstock! Lovely rosy-lilac buds open to white flowers flushed mauve pink at the edges with a distinctive yellow-brown flare. This plant is a well proven older variety that flowers well in early June. It certainly ranks as one of our favourites and is ideal for hedging and screening. If you have a difficult position this is definitely the plant for you. Vigorous and tolerating...
£31.95
Rhododendron Graffito INKARHORhododendron Graffito INKARHO
Rhododendron Graffito INKARHO
Available on the Inkarho rootstock! A really striking flower. White with a prominent wine red flare on the upper lobe in late May. This plant is particularly hardy with attractive dark green glossy leaves. Height 150cm in 10 years. Plant with plenty of good ericaceous compost to aid establishment. Recommended for: Tough with dinstinctive flower and great foliage. Easy to grow. Ideal position:...
£31.95

Rhododendron Karl Naue INKARHO
Rhododendron Karl Naue INKARHO
(H6) Strong red flowers in a domed truss, with dark red spotting on dorsal lobe, and prominent white filaments. Mid May-June flowering, set off with good dark green foliage. A tough plant from Hachmann, in Northern Germany. Height 150-175cm in 10 years. Requires moist acid soils. Introduced: Holger Hachmann 2007Etymology: named for the 71st birthday of the head of the Dittersdorf Baumschulen, Amtsberg...
£31.95
Rhododendron Madame Masson AGM INKARHORhododendron Madame Masson AGM INKARHO
AGM
Rhododendron Madame Masson AGM INKARHO
Now available on the Inkarho rootstock! White star-like flowers with a prominent golden yellow blotch, flowering in late May and early June. This is a very old hybrid that is extremely tough, reliable and striking. A dense well shaped plant with shiny dark foliage which is ideal for hedging and screening. Height 150-180cm in 10 years.Plant with plenty of good ericaceous compost to aid establishment. Recommended...
from £31.95

Rhododendron Nova Zembla INKARHORhododendron Nova Zembla INKARHO
Rhododendron Nova Zembla INKARHO
(H6) Deep pink in bud opening to deep pink flowers with darker spotting during late May to early June. These can fade to soft pink in strong sun, so best planted in dappled shade to preserve the colour. Great dark green foliage on a sturdy upright plant. Good for hedging and screening. It is also heat and sun tolerant, and very hardy. Height 150-175cm in 10 years.Plant with plenty of good ericaceous...
£31.95
Rhododendron Old Port INKARHO
Rhododendron Old Port INKARHO
Now available on the Inkarho rootstock! Extremely attractive medium reddish purple flowers with a deep blotch flowering in late May. This is a vigorous old hybrid with good glossy leaves. Height typically 150cm tall by 180cm wide in 10 years. Plant with plenty of good ericaceous compost to aid establishment. Recommended for: Striking flower and great foliage. Easy to grow. Ideal position: Most...
£595.00

Rhododendron Rabatz INKARHO
Rhododendron Rabatz INKARHO
Launched by us at Chelsea Flower Show 2011. Bright fiery red flowers with darker speckling, contrasting with pale anthers. Late May-June flowering. An attractive hybrid with wide funnel flowers. Height 150-180cm in 10 years. FINALIST IN RHS CHELSEA 2011 "PLANT OF THE YEAR"! We entered this into the stiff competition against all the best new plants of the Show, and were delighted that it was shortlisted...
£31.95
Rhododendron Roseum Elegans INKARHO
Rhododendron Roseum Elegans INKARHO
Now available on the Inkarho rootstock! Beautiful lavender flowers fading to pink, with reddish brown spotting. Flowering in late May early June this lovely old hybrid has olive green foliage. It tolerates sun, heat and cold and is a dense and vigorous grower. It is ideal for windbreaks or hedging and screening. Height 200cm in 10 years. Plant with plenty of good ericaceous compost to aid establishment. Recommended...
£125.00

Rhododendron Vulcan  AGM INKARHORhododendron Vulcan  AGM INKARHO
AGM
Rhododendron Vulcan AGM INKARHO
Now available on the Inkarho rootstock! This is a stunning plant with tall trusses of fiery-red flowers in May-June. It has long leaves and forms a compact, dome shaped bush. It will perform best in a fairly sunny position but is tough and always reliable. Height 140-160cm in 10 years. Plant with plenty of good ericaceous compost to aid establishment. Please note this variety has a broad habit, wider...
£31.95