Generated on December 16, 2025 at 3:46 PM
Rhododendron 'Cosmopolitan' enchants with pink-red blooms from March to May. Ideal for partial shade, it enhances any garden with year-round greenery.
Rhododendron 'Cosmopolitan' blooms from March to May. Adds stunning pink-red flowers to gardens. Perfect for partial shade. Evergreen foliage enhances year-round. Ideal for low maintenance gardens.
<p>Immerse yourself in the captivating beauty of Rhododendron 'Cosmopolitan'. This exquisite shrub graces your garden with rounded trusses of pale pink flowers, adorned with deep red markings that gradually soften over time. From March to May, these stunning blooms create a vibrant tapestry of color, turning your outdoor space into a springtime haven.</p><p>Perfect for partial shade, this medium-sized, evergreen perennial thrives in moist but well-drained, humus-rich acid soil. Its spreading habit and glossy green foliage make it an ideal choice for beds and borders, or as a striking feature in cottage and informal gardens. Whether your garden faces east, north, south, or west, 'Cosmopolitan' brings enduring charm throughout the year.</p><p>With minimal care requirements, Rhododendron 'Cosmopolitan' is a low-maintenance gardener's delight. Simply ensure it is situated in a sheltered spot and prune according to group 8 guidelines to maintain its shape and vigor. Propagate by semi-ripe cuttings in late summer or layering in autumn to expand your collection. Embrace the elegance and ease of this remarkable shrub, and watch your garden transform into a lush, colorful retreat.</p>
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"data": {
"scientific_name": "Rhododendron Cosmopolitan",
"common_names": [
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"description": "Outstanding pink flowers",
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"hardiness_zone": "Fully hardy",
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"flowering_months": [
"May",
"June"
],
"sun_exposure": "Light shade",
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"Humus-rich, moist, well-drained acid soil or ericaceous compost"
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"water_requirements": [
"Normal"
],
"aspect": [
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"East",
"West"
],
"foliage_type": "Evergreen",
"mature_size": "Medium",
"size": "2 litre pot",
"position": "Middle of border",
"special_features": [
"Low maintenance",
"Makes a good hedge or screen",
"Evergreen \/ semi evergreen",
"Non poisonous",
"Flowering",
"Plants that show resistance to deer and rabbits"
],
"pollinator_friendly": false,
"toxicity": "Humans\/Pets: Harmful if eaten",
"growth_rate": "Average",
"ground_cover": false,
"plant_type": "Shrubs",
"crocus_sku": "PL00005049",
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"plant_description": "Ravishing rounded trusses of pale-pink, funnel-shaped flowers with a deep red flowers with a deep red flare in late spring and early summer and glossy, dark green leaves. The flowers of this bushy, evergreen rhododendron gradually fade to light pink. Neat and dense in habit, Rhododendron 'Cosmopolitan' makes an attractive all-year plant for a shrub border with humus-rich, acid soil.",
"detailed_description": "Ravishing rounded trusses of pale-pink, funnel-shaped flowers with a deep red flowers with a deep red flare in late spring and early summer and glossy, dark green leaves. The flowers of this bushy, evergreen rhododendron gradually fade to light pink. Neat and dense in habit, Rhododendron 'Cosmopolitan' makes an attractive all-year plant for a shrub border with humus-rich, acid soil.",
"eventual_height_m": 2.5,
"eventual_height_cm": 250,
"eventual_spread_m": 1.5,
"eventual_spread_cm": 150,
"flowering_months_detailed": [
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],
"flowering_period": "May, Jun",
"position_detailed": "Light shade",
"rate_of_growth": "Average",
"soil_detailed": "Humus-rich, moist, well-drained acid soil or ericaceous compost",
"hardiness_detailed": "Fully hardy",
"care_instructions": "When planting, avoid planting too deeply, and incorporate well-rotted compost or manure into the planting hole, adding some mycorrhizal fungi to aid root establishment. Remove spent flower spikes regularly to encourage prolonged flowering. In late autumn, after flowering has finished, cut back any dead or damaged growth to maintain a tidy shape. In early spring, prune lightly to remove any winter-damaged stems and to promote strong, healthy new growth. Apply a generous 5-7cm (2-3in) mulch of leaf mould around the base of the plant each spring. Protect from strong winter winds."
},
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"scientific_name": "Rhododendron 'Cosmopolitan'",
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"rhododendron 'Cosmopolitan'"
],
"family": "Ericaceae",
"height_cm": "150-250",
"spread_cm": "150-250",
"hardiness_zone": "H4",
"sun_exposure": "Partial shade",
"soil_type": "Loam, Clay, Sand",
"moisture": "Moist but well-drained",
"soil_ph": "Acid",
"foliage_type": "Evergreen",
"aspect": "East-facing, North-facing, South-facing, West-facing",
"seasonal_interest": "Spring, Summer, Autumn, Winter",
"habit": "Spreading",
"plant_type": "Shrub",
"time_to_maturity": "5-10 years",
"suggested_uses": [
"Beds and borders",
"Cottage\/Informal"
],
"garden_uses": [
"Low maintenance garden"
],
"fragrant": "No",
"pollinator_friendly": "No",
"low_maintenance": "Yes",
"drought_tolerant": "No",
"seasonal_colours": {
"Spring": {
"months": [
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"Apr",
"May"
],
"Foliage": [
"Green"
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"Red"
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"Summer": {
"months": [
"Jun",
"Jul",
"Aug"
],
"Foliage": [
"Green"
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},
"Autumn": {
"months": [
"Sep",
"Oct",
"Nov"
],
"Foliage": [
"Green"
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},
"Winter": {
"months": [
"Dec",
"Jan",
"Feb"
],
"Foliage": [
"Green"
]
}
},
"flowering_months": [
"Mar",
"Apr",
"May"
],
"flower_colour": [
"Pink",
"Red"
],
"cultivation": "Grow in moist but well-drained, humus rich acid soil in a sheltered position in part shade; see rhododendron cultivation",
"pruning": "Pruning group 8",
"propagation": "Propagate by semi-ripe cuttings in late summer or layering in autumn for your own use",
"pests": "May be susceptible to vine weevil, rhododendron leafhopper, pieris lacebug, scale insects, caterpillars and aphids",
"diseases": "May be susceptible to various Rhododendron diseases including powdery mildew, rhododendron petal blight, rhododendron bud blast, silver leaf and honey fungus",
"toxicity": "Harmful if eaten. Wear gloves and other protective equipment when handling. Pets (dogs, cats, rabbits, tortoises) Harmful if eaten - for further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants ",
"description": "A medium-sized compact, evergreen perennial shrub, with long narrow glossy green leaves and a spreading habit. Rounded trusses of pale pink flowers, with deep red markings becoming paler with time, are produced in mid spring.",
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"rhs_image_url": "https:\/\/apps.rhs.org.uk\/plantselectorimages\/detail\/phbe06974.jpg",
"rhs_image_copyright": "visionspictures.com",
"_field_sources": {
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"flower_colour": "RHS",
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{
"crocus": {
"supplier": "Crocus",
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"source": "Crocus",
"data": {
"scientific_name": "Rhododendron Cosmopolitan",
"common_names": [
"hybrid rhododendron"
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"description": "Outstanding pink flowers",
"url": "https:\/\/www.crocus.co.uk\/plants\/_\/rhododendron-cosmopolitan\/classid.2192\/",
"image_url": "https:\/\/img.crocdn.co.uk\/images\/products2\/pl\/00\/00\/00\/21\/pl0000002192.jpg?width=440&height=440",
"hardiness_zone": "Fully hardy",
"flower_colour": [
"Pink"
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"flowering_months": [
"May",
"June"
],
"sun_exposure": "Light shade",
"soil_type": [
"Humus-rich, moist, well-drained acid soil or ericaceous compost"
],
"water_requirements": [
"Normal"
],
"aspect": [
"North",
"East",
"West"
],
"foliage_type": "Evergreen",
"mature_size": "Medium",
"size": "2 litre pot",
"position": "Middle of border",
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"Makes a good hedge or screen",
"Evergreen \/ semi evergreen",
"Non poisonous",
"Flowering",
"Plants that show resistance to deer and rabbits"
],
"pollinator_friendly": false,
"toxicity": "Humans\/Pets: Harmful if eaten",
"growth_rate": "Average",
"ground_cover": false,
"plant_type": "Shrubs",
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"plant_description": "Ravishing rounded trusses of pale-pink, funnel-shaped flowers with a deep red flowers with a deep red flare in late spring and early summer and glossy, dark green leaves. The flowers of this bushy, evergreen rhododendron gradually fade to light pink. Neat and dense in habit, Rhododendron 'Cosmopolitan' makes an attractive all-year plant for a shrub border with humus-rich, acid soil.",
"detailed_description": "Ravishing rounded trusses of pale-pink, funnel-shaped flowers with a deep red flowers with a deep red flare in late spring and early summer and glossy, dark green leaves. The flowers of this bushy, evergreen rhododendron gradually fade to light pink. Neat and dense in habit, Rhododendron 'Cosmopolitan' makes an attractive all-year plant for a shrub border with humus-rich, acid soil.",
"eventual_height_m": 2.5,
"eventual_height_cm": 250,
"eventual_spread_m": 1.5,
"eventual_spread_cm": 150,
"flowering_months_detailed": [
"May",
"Jun"
],
"flowering_period": "May, Jun",
"position_detailed": "Light shade",
"rate_of_growth": "Average",
"soil_detailed": "Humus-rich, moist, well-drained acid soil or ericaceous compost",
"hardiness_detailed": "Fully hardy",
"care_instructions": "When planting, avoid planting too deeply, and incorporate well-rotted compost or manure into the planting hole, adding some mycorrhizal fungi to aid root establishment. Remove spent flower spikes regularly to encourage prolonged flowering. In late autumn, after flowering has finished, cut back any dead or damaged growth to maintain a tidy shape. In early spring, prune lightly to remove any winter-damaged stems and to promote strong, healthy new growth. Apply a generous 5-7cm (2-3in) mulch of leaf mould around the base of the plant each spring. Protect from strong winter winds."
},
"scraped_at": "2025-12-16T15:45:58.299718Z"
}
}