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Most hobby gardeners think of pink or white flowering varieties in May when they think of rhododendron blossoms. But these fascinating heather plants have so much more to offer. Their sizes vary from flat carpets to meter-high shrubs, and with careful selection of the variety, the flowering period extends almost from March to October. We have therefore listed in detail when which rhododendron blooms.

Rhododendron flowering season

Early flowering rhododendron varieties

The rhododendrons of the first season include the very early varieties that delight us with their bright colors at the start of the season. When the first flowers open on the rhododendron depends heavily on the weather in late winter and spring. In general, the flowering period of the early varieties begins in March.

Rhododendron racemosum

Rh. dauricum 'April Reign'

  • romantic, rosy white flowers, height 80 to 150 cm

Rh. impeditum 'Ronny'

  • Dwarf variety up to 40 cm high, for the front border of beds or tubs

Rh.calophytum 'Sarastro'

  • Light pink flowers with a dark throat, 80 to 150 cm high, very large leaves

Rh. ponticum 'Filigree'

  • Height of growth 40 to 80 cm, exceptionally narrow foliage

Rh. hybrid 'Kromlauer Parkperle'

  • delicate pink flowers, over 150 cm tall

Rh. hybrid 'Minas Snow'

  • pure white flowers, height 80 to 150 cm

Rh. hybrid 'Friesiane'

  • light yellow flowers, height 80 to 150 cm

Rh. yakushimanum 'April morning'

  • delicate shade of pink, up to 70 cm high

Rh. yakushimanum 'Priscilla'

  • bright red flowers with dark, slightly wrinkled leaves, 40 to 80 cm high

Rh. yakushimanum 'Wanna Bee'

  • between the bud and the flower, the pink color lightens significantly up to a height of 80 cm

Rh. yakushimanum 'Sasonade'

  • Play of colors from red to bright orange, growth height 40 to 80 cm
Rhododendron argyrophyllum

Flowers from late April to mid-May

'Andrea'

  • new, attractive williamsianum hybrid, flowers light pink on the inside, pink on the outside

,Baden-Baden'

  • strong red flower color, tolerates the sun to a limited extent

'bengal'

  • red-flowered rhododendron with round, compact growth

'Hachmann's Andrea'

  • Strong pink flowers, flat, wide growth up to 120 cm

'susan'

  • white flowers with a soft violet tinge, markings in violet

'P.J.M.Elite'

  • small, purple-pink flowers with white stamens

'Princess Anne'

  • light yellow flower spike, small-flowered hybrid, bronze winter foliage

'City of Essen'

  • Two-tone lover's variety, pink on the outside, white on the inside with a pink border
Rhododendron sutchuenense

Flowering period from late May to mid-June

'anastasia'

  • particularly large, dark pink flowers, light pink on the inside

'Azurro'

  • dark violet flower color, long lasting

'Berlin Love'

  • large-flowered, red variety with dark green, glossy foliage

'Blue Pete'

  • Flowers in light blue to violet with blackberry-colored spots, large-flowered

,Bouzouki'

  • beautiful novelty with bright red flower colour

'caslap'

  • large-flowered variety, buds in light purple, the flowers are more white with a delicate purple hue

'Ice Princess'

  • double flowers in pure white

,Germania'

  • particularly large inflorescence in dark pink with a light center
Rhododendron makinoi

'gold bucket'

  • light yellow flowers, tinted faintly pink towards the outside

'Gomer Waterer'

  • well-established, white variety with a delicate lilac tint

'Hachmann's Charming'

  • expressive flowers in white with a pink border

'Kermesina Rosé'

  • light pink with a pure white border, flowers profusely

'cockardia'

  • eye-catching ruby pink color with black-red flower markings

'Marcel Menard'

  • dark violet, large flowers with showy white anthers

'Nefertiti'

  • bright, dark pink flowers with a white throat and black-red markings
Rhododendron racemosum

'Rasputin'

  • large-flowered variety in dark purple

'scintillation'

  • romantic, soft pink-colored blossoms

'City of Westerstede'

  • large-flowered variety in an appealing shade of yellow

'sachiko'

  • Orange, richly flowering variety with a slight red tint

flowers in July

Wild species such as Rh. camtschaticum

  • light purple to dark purple flowers, smaller than cultivars

Rh. viscosum varieties

  • Rhododendrons and azaleas, the 'Summer Fragrance' variety smells particularly distinctive
Rhododendron calophytum

Autumn flowering varieties

For example, if a rhododendron blooms in May, the flower buds for the following year can already be seen in August of the same year. Basically, therefore, varieties that flower in autumn are not particularly late in flowering, but particularly early. There are now a variety of rhododendron varieties that show around a third to half of their flowers from August to September. The remaining buds then open between the end of April and June of the following year. Exactly when the flowers open is usually dependent on both the variety and the weather.

'Autumn Joy'

  • light pink flowering twice a year

'Cunningham's White'

  • white flowers from August

Rh. yakushimanum 'Koichiro Wada'

  • light pink trumpet flowers
Rhododendron sutchuenense

'Autumn Joy'

  • light pink with a dark eye

'autumn magic'

  • pink flowers

'autumn greeting'

  • pure white flower with dark red dots

'vintage'

  • purple-pink flowers with a scalloped edge

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Garden plants