Posted by Gus on 3/4/2009, 1:45 pm, in reply to "Re: How many years does it take for Eucalyptus deglupta to reach full maturity?" Link: Eucalyptologics: Info resources on eucalypt cultivation worldwide
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Hello 
I am sorry to say there is no universal answer to your question. Results would be different depending on the place you grow it.
If you think of an isolated tree specimen, main limitation for growth rates is climate. The closer to its native habitat climate, the closer to the once known as "world's fastest growing tree". As indication, +30 meters height in less than 5 years have been recorded. (Which is overwhelming, even by our local standards!)
If you think of merchantable size, this is mostly driven by a minimum calliper. So, it depends also on spacing for a group of trees. This spacing also has an effect on height (average height and individual height). Merchantable volumes of timber can be achieved in less than 10 years, in proper climate. Different issue, if there is a market for it nearby, or not 
If you think of reproductive maturity, the timeframes are also short. But, again, in proper climate.
The performance of Eucalyptus deglupta is very different when grown out of the tropics (maybe we should say equatorial climates!). Very site-sensitive, and very "rainfall/temperature-pattern-and temperature-extreme dependant" species.
To say it another way, this "Rainbow Rocket" is a biomass producing high-speed Ferrari-engined roadster with impressive performance at full throttle. But you cannot make it work like that in every road
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