Eucalyptus flowers: E. macarthurii in bloom

Phenology of E. macarthurii in Galicia (Northwestern Spain)

Gustavo Iglesias Trabado Contact GIT Forestry Consulting
GIT Forestry Consulting - Consultoría y Servicios de Ingeniería Agroforestal - www.git-forestry.com - EUCALYPTOLOGICS


Eucalyptus macarthurii flower buds and blooms in Northwestern Spain /Camden Woollybutt flowers / Eucalipto lanudo de Camden en flor en el Galicia / Eucalipto de MacArthur florece en Galicia / GIT Forestry Consulting, Consultoría y Servicios de Ingeniería Agroforestal
Blooming starts: August
Blooming ends: October
Nº simultaneous flower/fruit crops: up to 3
Seed maturity after flower bud formation: 18 to 30 months
Seed maturity after blooming: 12 to 18 months

The Eucalyptus of Sir William Macarthur can reach up to 40 meters height when grown at forestry plantings on good sites, or remain a shorter tree of wider crown and retaining basal branches when grown as isolated specimen (20-30 m).

Eucalyptus macarthurii specimen tree in Northwestern Spain /Camden Woollybutt flowers / Eucalipto lanudo de Camden en Galicia / Eucalipto de MacArthur florece en Galicia / GIT Forestry Consulting, Consultoría y Servicios de Ingeniería Agroforestal
Its quite good cold hardiness, resisting down to -10ºC and more than 80 frost events per year, and its average growth rates, made of it one of the alternative species in Northwestern Spain to E. globulus for inland areas or beyond 500 meters above sea level before the widespread planting of E. nitens.


Eucalyptus macarthurii flower buds and blooms in Northwestern Spain /Camden Woollybutt flowers / Eucalipto lanudo de Camden en flor en el Galicia / Eucalipto de MacArthur florece en Galicia / GIT Forestry Consulting, Consultoría y Servicios de Ingeniería Agroforestal
Prolific in flowering, individual blooms are very small sized and difficult to notice. In clusters of seven, they become small white masses, same way as E. pauciflora. But these inflorescences are yet the size of a thumb. Which does not stop bees and other pollinators.

Eucalyptus macarthurii specimen tree in Northwestern Spain /Camden Woollybutt flowers / Eucalipto lanudo de Camden en Galicia / Eucalipto de MacArthur florece en Galicia / GIT Forestry Consulting, Consultoría y Servicios de Ingeniería Agroforestal
Studies conducted in the 1980's by Pezeshki and the University of Washington (USA) at Lee Experimental Forest proved its cold hardiness reaches its limits around -14ºC, but can coppice after that.

We include it in category ATL1 (absolute minima from -5ºC to 10ºC) for safe cultivation, but suitable seed provenances and origins could be tried with caution in the mildest part of ATL2 zone (absolute minima from -10ºC to -15ºC).


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