Susceptible to rust.Flower Colour : Vibrant pinkFlowering Time : April-May Scented :   No Ultimate Height :  0.30 metres / 0 feet 11 inchesParentage : Pioneer selfedHardiness : -18°C (0°F) Hardy in all but the coldest parts of UK.Group : Compact & Medium Hybrids up to 2m.. Super vigorous American Hybrid. [Return to Top]. Huge satiny white/ pink flowers with chocolate blotch, in early spring. Best in a tub, so it can be protected under glass in the winter.Flower Colour : White, scentedFlowering Time : March-April Scented :   Yes Ultimate Height :  1.50 metres / 4 feet 11 inchesParentage : Lady Alice Fitzwilliiam x edgeworthiiHardiness : -12 to -15°C (10°F to 5°F) Hardy in a sheltered site in most UK, Damaged in severest winters.Group : Compact .. A medium sized compact plant. Cultivating the soil around rhododendrons and azaleas would damage their roots. Heat tolerant.Flower Colour : Medium-pink, deeper in throatFlowering Time : June Scented :   No Ultimate Height :  10.00 metres / 32 feet 9 inchesParentage : griersonianum x auriculatumHardiness : -18°C (0°F) Hardy in all but the coldest parts of UK.Group : Large Hybrids over 2m.. Forms large spreading shrub. fortunei combine with the long narrow leaves of R. griersonianum; and how would the dominant apricot-orange color of R. dichroanthum be affected by the pink R. fortunei? Furnival', pink with maroon blotch; 'Purple Splendor', royal purple with black blotch; and 'Scintillation', light pink (all 3 to 5 feet tall). [Return to Top]. Growing rhododendron successfully requires the proper planting spot for the rhododendron bush. 15 Rhododendron cinnabarinum x Rhododendron cinnabari- Alpine Glow AM', Rhododendron 'Avalanche var. Henry Street Two Little Girls ,Abigale and Andra)Flower Colour : Deep yellowFlowering Time : May-June Scented :   No Ultimate Height :  1.50 metres / 4 feet 11 inchesParentage : Goldsworth Orange x Mrs P.D.WilliamsHardiness : -18°C (0°F) Hardy in all but the coldest parts of UK.Group : Compact & Medium Hybrids up to 2m.. Compact rounded shrub, with very dark green crinkly leaves. Rather tender. There are also naturally occurring hybrids. [Return to Top]. Leaves are veined. Detailed procedures for pruning rhododendrons are discussed and illustrated in "Rhododendrons of the World" by David Leach. plants, either species or hybrids or a combination of a hybrid Not to be confused with Abegail.Flower Colour : Large pink, orange tonesFlowering Time : May Scented :   No Ultimate Height :  2.00 metres / 6 feet 6 inchesParentage : Goldsworth Orange x Mrs P.D.WilliamsHardiness : -15°C (5°F) Hardy in a sheltered site in most UK, Damaged in severest winters. True rhododendrons have 10 stamens in a flower and azaleas have only 5. true to the parent from seed. Flower Colour : Flowering Time : April Scented :   No Ultimate Height :  0.00 metres / 0 feet 0 inchesParentage : Hardiness : Group : Large Hybrids over 2m.. Low growing spreading variety. When written, cultivar names are contained within single Size 15cm-1.5m | H4-5. These are the hardiest varieties suitable for the coldest areas suitable for growing rhododendrons.Group : Compact & Medi.. Upright compact evergreen shrub with masses of rich purple azalea-like flowers. Most varieties grown in the USA range between H-1 and H-4 in hardiness. Unusual ruby red flowers, needs protecting from late frosts and sometimes prone to powdery mildrewFlower Colour : Ruby redFlowering Time : July Scented :   No Ultimate Height :  1.50 metres / 4 feet 11 inchesParentage : sanguineum ssp. Flower Colour : Flowering Time :  Scented :   No Ultimate Height :  0.00 metres / 0 feet 0 inchesParentage : ponticum x griffithianumHardiness : Group : Large Hybrids over 2m.. Soft, lemon-yellow flowers in full truss. Dec 9, 2016 - Explore Tim B's board "Rhododendron hybrids" on Pinterest. R. catawbiense was collected in the wild in 1803 in the Eastern US and was introduced to Britain in 1809. Standing out in the H-1 group, which is hardy to Zone 4, with flower buds that tolerate -25°F in winter, is 'P.J.M.' Often early into flower and growth.Group : Large Hybrids over 2m.. Opening in batches over a long period. Halfdan Lem, the hybridizer, also posed interesting questions Henry Street, Two Little Girls, Abigail and Andra). characteristics. Valuable for flowering later. All rhododendrons and azaleas will grow well in light shade; the Carolina rhododendrons will bloom more abundantly in full sun if the soil is kept moist, but in hot climates or in windy places shade is usually mandatory. Some of the original "Wilson's Dozen" plants are no longer easily found and have be replaced by the modern list of "iron-clads": * indicates that it is among the most cold hardy rhododendrons. Plants bearing the code designation H-1 survive to -25°F, H-2 to -15°F, H-3 to -5°F, H-4 to 5°F, H-5 to 15°F, H-6 to 25°F and H-7 to 32°F. Flower Colour : Flowering Time :  Scented :   No Ultimate Height :  0.00 metres / 0 feet 0 inchesParentage : Hardiness : Group : large Hybrids over 2m.. Forms a gnarled shrub, dark green leaves, puckered above,tawny indumentum below. Plants that have been given a soil mixture rich in organic matter probably will not need feeding for several years. Good for cold gardens.Flower Colour : Deep pinkFlowering Time : late May-June Scented :   No Ultimate Height :  3.00 metres / 9 feet 10 inchesParentage : griffithianum hybridHardiness : -23°C (-10°F) Hardy anywhere in the UK and moderate parts of Europe such as Holland, southern Sweden, coastal Denmark, favourable parts of Germany etc.Group : Large Hybrids over 2m.. confusion with species, such names should not be in Latin. This is a parent of the Rh, Naomi, as well as other hybrids. Both are members of the genus Rhododendron, and have very similar blossoms. Species are naturally occurring plants that will reproduce It can be perpetuated by vegetative reproduction Huge trusses of Pink flowers with a small rosy blotch at the base, . Good in cold gardensFlower Colour : Fluorescent pinkFlowering Time : May Scented :   Yes Ultimate Height :  4.00 metres / 13 feet 1 inchesParentage : griersonianum x Countess of DerbyHardiness : -23°C (-10°F) Hardy anywhere in the UK and moderate parts of Europe such as Holland, southern Sweden, coastal Denmark, favourable parts of Germany etc.Group : Large Hybrids over 2m.. White flowers, flushed solferino purple; striped purple on outside. Hence Rhododendron albiflorum defines a unique species. Long narrow dark green leaves. Both species and hybrid rhododendrons (including azaleas) are used extensively as ornamental plants in landscaping in many parts of the world, including both temperate and subtemperate regions. Plant resulting from cross-fertilization between genetically different parents of distinct species or hybrids. Extremely valuable as it is scented and flowers very late in the season.Flower Colour : Rich PinkFlowering Time : August Scented : Yes Ultimate Height : 4.00 metres / 13 feet 1 inchesParentage : auriculatum xHardiness : Group : Large Hybrids over 2m.. Most of the rhododendrons and azaleas grown in gardens are hybrids, and their ability to resist cold differs remarkably from one variety to another. Generally they are classified as large-leaved, with foliage 3 inches or more in length, and small-leaved, with foliage under 3 inches. [Return to Top]. In the hardiest (H-1) group, which is hardy to Zone 4, with flower buds that tolerate -25°F in winter, recommended varieties are 'Boule de Neige', white; 'Pink Cameo', pink with yellow blotch; 'Prize', pink with brown blotch; and 'Tony', cherry red (all 2 to 3 feet tall after 10 years); 'America', bright red; 'King Tut', light and deep pink; 'Pinnacle', pink with citron blotch; and 'The General', crimson with dark blotch (all 3 to 5 feet tall); 'Lavender Queen', pale lavender, and 'Spring Dawn', rosy pink with yellow blotch (both 5 or more feet tall). Iron-clads are by definition plants that have been popular for a long time and are easy to grow, even in cold climates. Tall tree-like open habit, requires a sheltered and shaded site.Flower Colour : Blush pink-whiteFlowering Time : late May Scented :   Yes Ultimate Height :  3.00 metres / 9 feet 10 inchesParentage : fortunei ssp discolor x griffithianumHardiness : -18°C (0°F) Hardy in all but the coldest parts of UK.Group : Large Hybrids over 2m.. *English Roseum, a lilac rose with orange blotch, R. Lee's Dark Purple, a royal purple with a yellow blotch R. *Minnetonka, a lavender-pink with a chartreuse blotch R. *Nova Zembla, a bright red with black spots, (Parsons Grandiflorum x hardy red hybrid), 4 to 6 feet, *Purpureum Elegans, a purple with brown spots; R. *Roseum Elegans, a rosy lavender with reddish spotting, R. Ideal as specimens or in massed plantings if you are lucky enough to … Bronze-green foliage. with this parentage: how would the large round leaves of R. Because the roots grow near the surface, a bed prepared especially for rhododendrons and azaleas need not be more than 12 inches deep; deep planting keeps the roots from getting the air they need. Red flowers, flowers.Flower Colour : RedFlowering Time : January-March Scented :   No Ultimate Height :  10.00 metres / 32 feet 9 inchesParentage : arboreum x grande HybridHardiness : -18°C (0°F) Hardy in all but the coldest parts of UK.Group : Large Hybrids over 2m.. White flowersFlower Colour : WhiteFlowering Time : Jan-May Scented :   No Ultimate Height :  0.00 metres / 0 feet 0 inchesParentage : Hardiness : -12°C (10°F) Hardy outdoors in milder parts of UK (such as Cornwall, Argyll), southern Ireland.Group : Large Hybrids over 2m.. Lax trusses of 12 mimosa yellow flowers, campanulate.Flower Colour : Mimosa yellowFlowering Time : May Scented :   No Ultimate Height :  0.00 metres / 0 feet 0 inchesParentage : Crest x Loderi JulieHardiness : Group : Large Hybrids over 2m.. Fine old hybrid,tree like in habit. Rhododendron Hybrids/cultivars: 'Azurro' Pictures and information about rhododendron Azurro. Also, in order to avoid Often early into flowe.. Upright hybrid. The hybrid rhododendrons are immensely varied in color, size, shape and winter hardiness as a result of their complex genetic background. by crossing two hybrids. The descriptions below cover rhododendrons that have proved satisfactory in fairly broad regions. This group included: Ten years later he dropped ´H. A final word. An overstory of hemlock, birch, oak, maple, and pine provide ideal rhododendron habitat. Clones are vegetative replicas of the original cultivar or Do not stimulate fast growth because it produces long weak stems and few flowers. Huge trusses of Pink flowers with a small rosy blotch at the base, . The species itself is very worthwhile, as the new foliage emerges covered in white to cream felt-like hairs (tomentum). Generally they are classified as large-leaved, with foliage 3 inches or more in length, and small-leaved, with foliage under 3 inches. and clone. because it provides valuable clues about the potential results Raised by J. Gowen, Head gardener to the Earl of Carnarvon at Highclere Castle, Newbury, Berkshire, UKFlower Colour : Deep redFlowering Time : May Scented :   No Ultimate Height :  7.00 metres / 22 feet 11 inchesParentage : (catawbiense x ponticum) x arboreumHardiness : -18°C (0°F) Hardy in all but the coldest parts of UK.Group : Compact & Medium Hybrids up to 2m.. Yellow flowersFlower Colour : YellowFlowering Time : April-May Scented :   No Ultimate Height :  0.00 metres / 0 feet 0 inchesParentage : ambiguum x cinnabarinumHardiness : -18°C (0°F) Hardy in all but the coldest parts of UK.Group : Large Hybrids over 2m.. Pink buds opening to white flushed pink flowers with maroon and gold flecksFlower Colour : Flowering Time :  Scented :   No Ultimate Height :  0.00 metres / 0 feet 0 inchesParentage : degronianum ssp. Flowers similar to "Britannia", large 10-14 flower rounded trusses of crimson-scarlet. But if a plant seems weak or sickly, use cottonseed meal or a special rhododendron-azalea-camellia fertilizer, dusted on the soil early in the spring. An unnamed hybrid raised at RHS Gardens, Wisley, UK, by Francis Hanger when Curator there.Flower Colour : WhiteFlowering Time :  Scented :   No Ultimate Height :  0.50 metres / 1 feet 7 inchesParentage : aureum x degronianumHardiness : Group : Dwarf Hybrids up to 1m.. Forms a wide crowned small tree .Bright green leaves, upto 30cm long,covered with silky hairs when young, giving the whole plant a silvery appearance. XXL is stunning in late April and early May. Cultivar or cultivated variety refers to plants, occurring Often early into flower and growth.Group : Large Hybrids over 2m.. Reddish-purple flowers with deeper blotch. Long bright green leaves. A final group of hardy large-leaved rhododendrons are the ‘Yak’ hybrids, developed from the species R. yakushimanum. yakushimanumHardiness : Group : Large Hybrids over 2m.. Evergreen tall shrub with enormous scented flowers, blush pink-white with pale green spots within, held in magnificent upright trusses. : P.J.M. definition is more precise. Superb white,yellow eye, possibly scentedFlower Colour : White, yellow eyeFlowering Time : July-August Scented :   Yes Ultimate Height :  10.00 metres / 32 feet 9 inchesParentage : auriculatum HybridHardiness : -18°C (0°F) Hardy in all but the coldest parts of UK.Group : Large Hybrids over 2m.. A strong growing tall shrub with bold foliage and magnificent rich pink flowers. Matt green leaves with a fawn reverse. [Return to Top]. Best colour of all the early reds.Flower Colour : CrimsonFlowering Time : March-April Scented :   No Ultimate Height :  2.00 metres / 6 feet 6 inchesParentage : barbatum x hookeriHardiness : -15°C (5°F) Hardy in a sheltered site in most UK, Damaged in severest winters. with Latin names; these still stand but new cultivars must have Recent introduction. Height 150-180cm in 10 years. It produces pale blush pink f owers in March, which are held in loose trusses of 2-3. Hardy Hybrid Rhododendron Cunningham’s White. led to more rounded foliage (through R. fortunei). Hybrids all have one trait in common; they will not reproduce Rhododendrons are the most impressive flowering shrub in the Northeast and the Northwest, while the most stunning flowering shrub of the Southeast, Gulf Coast and Southern California is the evergreen azalea (neither survive well in the central U.S.). Family: Ericaceae. A good plant to complement the 'Blues' and dwarf yellows.Flower Colour : Rich purpleFlowering Time : April-May Scented :   No Ultimate Height :  1.00 metres / 3 feet 3 inchesParentage : russatum x Blue DiamondHardiness : Group : Compact & Medium Hybrids up to 2m.. Rose opal to jasper red flowers in trusses of 15. Most smother themselves in flower and have small scaly leaves and are dense twiggy growers. and a species. Dark lavender blue star shaped flowers in small trusses. either naturally or in cultivation, that are not capable of reproducing Hybrid rhododendrons, on the other hand, are plants resulting from the cross-pollination of one species with a different species or hybrid. Group: Hybrid Rhododendron (Inkarho). Rhododendron Maharani - medium shrub with trusses of large creamy flowers with red flare. Dark green leaves. A recommended variety in the H-4 group, hardy to Zone 7, with flower buds that tolerate -+5°F in winter, is 'Snowlady', grows to a height of only 30 inches, produces an abundance of snowy white flowers and has fuzzy green leaves. Similar to Blue Tit in appearanceFlower Colour : Dark lavender blue, star shapedFlowering Time : April-May Scented :   No Ultimate Height :  0.90 metres / 2 feet 11 inchesParentage : augustinii x fastigiatumHardiness : -15°C (5°F) Hardy in a sheltered site in most UK, Damaged in severest winters. Flower Colour : Flowering Time :  Scented :   No Ultimate Height :  4.00 metres / 13 feet 1 inchesParentage : Hardiness : -18°C (0°F) Hardy in all but the coldest parts of UK.Group : Large Hybrids over 2m.. Forms large spreading shrub. The flowers are somewhat smaller than most other rhododendrons. Pictures, photos and information about rhododendrons hybrids. Extremely valuable as it is scented and flowers very late in the season.Flower Colour : Rich PinkFlowering Time : August Scented :   Yes Ultimate Height :  4.00 metres / 13 feet 1 inchesParentage : auriculatum xHardiness : Group : Large Hybrids over 2m.. Soft Pink Sweetly Scented. Botanical Pronunciation: roh-do-DEN-dron. In the north, grow in plenty of light away from drips from trees. Donald Waterer sold the nursery in 1976 to Slocock Nurseries. A favorite mixture on the West Coast is 1/2 peat moss and 1/2 ground redwood, but in such mixtures, plants must be fed regularly. Glendoick have around 5000 varieties in their collection and propagate around 1000 species and hybrids. Forming a neat rounded shrub. As of the end of December, 2002, the number of registered rhododendron hybrids was: Of these, several hundred are readily available in the nursery trade and perhaps another hundred are in the greenhouse azalea trade. Best with winter protection. Grows to become a very large tree. Flower Colour : Flowering Time :  Scented :   No Ultimate Height :  1.20 metres / 3 feet 11 inchesParentage : Hardiness : -18°C (0°F) Hardy in all but the coldest parts of UK.Group : Large Hybrids over 2m..
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