Eucalyptus globulus (Blue gum)
Viable seeds / kg (approx.): 217,000
Minimum purchase: 25 g
E. globulus is native to Tasmania, Victoria and New South Wales. In natural
condition and good sites it can reach 75 m in height, usually with a single straight trunk, although in plantation it is usually
harvested with smaller dimensions.
The wood is used for both light and heavy construction, and for poles
and sleepers. It is yellow-brown, with cross-grain, strong and moderately
In its natural habitat it grows at altitudes from 0 to 1100 masl, with mean
annual rainfall of 600-1100 mm, but in tropical areas it prefers altitudes above
1600 masl. It has been planted as exotic in a wide range of conditions, except
in tropical lowlands, or with prolonged droughts.
It grows in a wide range of soils, but it prefers moderately fertile
soils, of neutral pH, well drained, with adequate humidity.
Seeds and nurseries
It does not require
pre-germination treatments. Due to the small size of the seeds, germinators
should be used, with a loose substrate such as river sand, well washed and disinfected,
in which the seed is placed superficially. Germination occurs in a period of 7-10
days, reaching conditions for transplanting 1-2 weeks after germination. The
root is usually very long, so it must be pruned to about 3 cm in length. When
transplanting, be sure to make a hole deep enough in the substrate to avoid
curving up of the roots. Shade should be provided for the first 2-3 weeks after
transplanting, for instance using shade clothing (saran) 50%. The plants will be ready for field planting after 3 -
4 months or when they have a height of 15 to 20 cm. A couple of weeks
before planting out in the field it is recommended to reduce watering to
stimulate the lignification of the stems.
E. globulus is a fast growing species, so it has been planted extensively as an exotic.
Volume increments of 12 to 30 m3 / ha / year are reported.
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