Rhododendron 'Humboldt'

*Rhododendron* 'Humboldt'
Rhododendron 'Humboldt'
Taxonomy
Kind	Rhododendron
Grade	'Humboldt'
Synonyms
	Rhododendron catawbiense 'Humboldt'; Rhododendron cv. Humboldt; Rhododendron 'Humboldt' ;
Origin
Parents
	Rhododendron catawbiense ×?
Country of origin	Germany
Breeder	TJ Rudolf Seidel , circa 1906 or 1926

Rhododendron 'Humboldt' is a variety of evergreen rhododendrons .

Katevbinsky rhododendron hybrid ( lat.Rhododéndron catawbiense ).

Biological Description

Evergreen, compact, highly branched shrub 1.5–2 m high. In Germany, at the age of 15 years, height is about 150 cm, width is about 180 cm ^[4] .

The leaves are leathery, oblong-elliptic, up to 12 cm long, 3-5 cm wide, dark green above, paler below, shiny, glabrous.

Inflorescences are spherical, bear 16-20 flowers.

The flowers are light purple-pink with a black-red spot, a diameter of about 80 mm. There is no aroma . The stamens are purple.

The flowering is plentiful in June. Duration about 30 days ^[5] ^[1] ^[4] .

In Culture

'Humboldt' is one of the most popular and widespread varieties of rhododendron in Northern Germany . It is rare in Finland . His stamina is not quite sufficient, although he tolerates winters well under the protection of snow. In Northern Germany, the 'Humboldt' reaches more than two meters in height, but in Finland, due to the severity of snow and low frost resistance, its height barely exceeds one meter. When wintering under snow, it blooms normally ^[6] . In central Russia, it hibernates under light shelter (leaves and spruce branches) ^[1] .

It withstands temperature drops to −29 ° С ^[5] .

Diseases and Pests

Descendants of Rhododendron 'Humboldt'

'Andrea' Ottomar Domschke (before 1978) (= 'Gudrun' × 'Humboldt')
'Angelique' Bernhard Knorr (circa 1985) (= 'Adriaan Koster' × 'Humboldt')
'Barnowl' Bernhard Knorr (1975) (= 'Johann' × 'Humboldt'
'Bastl (alt)' Bernhard Knorr (before 1987) (= ( 'Cunningham's White' × 'Cunningham's White') × 'Humboldt')
'Caucaboldt' Bernhard Knorr (before 1972) (= 'Ochroleucum' × 'Humboldt')
'Dancing Eyes' Uwe Genzel (1986) (= 'Humboldt' × R. degronianum ssp. Yakushimanum var. Yakushimanum )
'Doberluger Weiße' Erich Herrmann (1964) (= 'Madame Carvalho' × 'Humboldt')
'Elstertal' Erich Herrmann (1964) (= 'Madame Carvalho' × 'Humboldt')
'Emil Pusch' Bernhard Knorr (1982) ((= 'Sába' × 'Humboldt') F2)
'Frühlingsfreude' Ottomar Domschke (before 1978) (= 'Gudrun' × 'Humboldt')
'Hachmann's Constanze' Hans Hachmann (1959) (= 'Humboldt' × 'Kluis Sensation' )
'Hachmann's Ornament' Hans Hachmann (1957) (= 'Humboldt' × 'Direktör E. Hjelm' )
'Hannelore' Ottomar Domschke (circa 1975) (= 'Gudrun' × 'Humboldt')
'Holstein' Hans Hachmann (1959) (= 'Humboldt' × 'Catawbiense Grandiflorum' )
'Katharina' Ottomar Domschke (before 1978) (= 'Gudrun' × 'Humboldt')
'Kokardia' Hans Hachmann (1957) (= 'Humboldt' × 'Direktör E. Hjelm' )
'Lamentosa' Hans Hachmann (1968) (= 'Humboldt' × 'Koichiro Wada' )
'Madlen' Ottomar Domschke (before 1978) (= 'Gudrun' × 'Humboldt')
'Mandy' Berthold Leendertz (1978) (= 'Humboldt' × ( 'Mrs RS Holford' × 'Goldsworth Orange' ))
'Marina Domschke' Ottomar Domschke (before 1978) (= 'Gudrun' × 'Humboldt')
'Meeresleuchten' Wilhelm Bruns (1971) (= 'Humboldt' × 'Mount Kibo' )
'Michael' Ottomar Domschke (before 1978) (= 'Gudrun' × 'Humboldt')
'Paeonia' Bernhard Knorr (before 1975) (= 'Johann' × 'Humboldt')
'Schneekrone' Hans Hachmann (1968) (= 'Humboldt' × 'Koichiro Wada' )
'Silberglanz' Hans Hachmann (1968) (= 'Humboldt' × 'Koichiro Wada' )
'Silvetta' Hans Hachmann (1968) (= 'Humboldt' × 'Koichiro Wada' )

Notes

↑ ¹ ² ³ Alexandrova M. Aristocrats of the garden: flowering shrubs. - M .: ZAO Fiton +, 1999. - 192 p. - ISBN 5-93457-001-3 .
↑ Erhard Moser. The Seidel Rhododendrons-Origins and Types // Journal of the American Rhododendron Society. - 1990. - T. 44 , No. 3 .
↑ Karel Hieke. Rhododendrons In Czechoslovakia: Czechoslovak Breeding Program // Journal American Rhododendron Society. - 1988. - T. 42 , No. 1 .
↑ ¹ ² Rhododendron 'Humboldt' TJ Rudolf Seidel (um 1906) (German) . Landwirtschaftskammer Niedersachsen. Date of treatment November 6, 2013.
↑ ¹ ² Description of Rhododendron 'Humboldt' . American Rhododendron Society. Date of treatment November 6, 2013.
↑ Rhododendron - Rhododendron 'Humboldt' (neopr.) . Arboretum Mustila. Date of treatment January 10, 2017.

Literature

Malciūtė A .; Naujalis JR; Šaulienė I. The seasonal development characteristic of different rhododendrons taxa and cultivars in Northern Lithuania. 1. Leafing peculiarities. // Žemdirbystė (Agriculture). - 2010. - T. 97 , No. 4 . - S. 107-114 .
Malciūtė A .; Naujalis JR; Šaulienė I. The seasonal development characteristics of different taxa and cultivars of rhododendrons in Northern Lithuania. 2. Flowering peculiarities. // Žemdirbystė (Agriculture). - 2011. - T. 98 , No. 1 . - S. 81-92 .

Links

Voronina S. Rhododendrons. The difficult problem of choice (unopened) . Daylily.ru. Date of treatment November 2, 2013.
Barbuhatti G. Rhododendrons for the northwest (Neopr.) . Daylily.ru. Date of treatment November 1, 2013.

[Александрова-1] ¹ ² ³ Alexandrova M. Aristocrats of the garden: flowering shrubs. - M .: ZAO Fiton +, 1999. - 192 p. - ISBN 5-93457-001-3 .

[2] Erhard Moser. The Seidel Rhododendrons-Origins and Types // Journal of the American Rhododendron Society. - 1990. - T. 44 , No. 3 .

[3] Karel Hieke. Rhododendrons In Czechoslovakia: Czechoslovak Breeding Program // Journal American Rhododendron Society. - 1988. - T. 42 , No. 1 .

[lwk-niedersachsen-4] ¹ ² Rhododendron 'Humboldt' TJ Rudolf Seidel (um 1906) (German) . Landwirtschaftskammer Niedersachsen. Date of treatment November 6, 2013.

[Society-5] ¹ ² Description of Rhododendron 'Humboldt' . American Rhododendron Society. Date of treatment November 6, 2013.

[6] Rhododendron - Rhododendron 'Humboldt' (neopr.) . Arboretum Mustila. Date of treatment January 10, 2017.