Yes. Rainbow eucalyptus grows in Costa Rica, and grows extremely well here.
But there is a second half to that answer that most pages leave out, and it changes what you do with the information: not one of them is wild. Every rainbow eucalyptus in this country was put there by somebody. There is no forest of them to go and find.
What the tree actually is
Eucalyptus deglupta is native to the Philippines, Indonesia and Papua New Guinea — and it is the odd one out of its entire family.
Of the hundreds of eucalyptus species, almost all are Australian, dry-country trees. This one lives in rainforest, and its natural range is the only one in the genus that crosses into the northern hemisphere.
That is precisely why it settled into Costa Rica so easily. A tree built for wet tropical lowlands near the equator was never going to struggle on the Caribbean side. It grows from sea level to about 1,800 metres, wants rich wet soil and full sun, and cannot tolerate frost. Left alone it reaches 60 to 75 metres — taller than almost anything in a Costa Rican forest.
The colours are not what people think
The bark is not coloured. It is ageing.
The tree sheds its outer bark in strips, and each strip comes away at its own time rather than all at once. Whatever is underneath is exposed bright green — and from that moment it begins to darken, moving through blue, then purple, then orange and rust, and finally to a deep maroon, at which point that strip peels away and the cycle restarts beneath it.
So a trunk is not a painting. It is a calendar. Every colour on it is the same substance at a different age, and you are looking at several months of shedding happening in different places at once.
Which also explains something people find disappointing in photographs: the effect is strongest on a large, mature, actively growing trunk in a wet place. A young tree in a dry spot is mostly grey-green, and no photograph of one looks like the postcards.
How it got here, which is a nineteenth-century story
Eucalyptus arrived in Costa Rica through the country’s early scientific establishment. Between roughly 1896 and 1903, the botanists Henry Pittier and Adolfo Tonduz imported eucalyptus seed and distributed it free to farmers and municipalities around the country.
That is why eucalyptus of one kind or another turns up in odd corners of Costa Rica — beside old schools, along municipal boundaries, in windbreaks planted a century ago by someone who was given the seed for nothing.
The rainbow eucalyptus specifically came later and for a different reason: reforesting worn-out land. It grows fast, tolerates poor wet ground, and holds soil on a slope. The largest stands today are commercial plantations in the Caribbean lowlands of Limón, with more in the southern Pacific lowlands around the Osa, plus plantings on university campuses and in botanical gardens.
Near Arenal there is a well-known example of the pattern: from 1973 a family began replanting an exhausted cattle ranch, putting several hundred acres into rainbow eucalyptus and other species to stop the hillsides washing away. Fifty years on, those trees are close to a hundred feet tall. That is the reason there are impressive rainbow eucalyptus in Costa Rica at all — not tourism, erosion.
The argument nobody mentions on the postcards
Eucalyptus is contentious in Costa Rica, and it is worth setting out honestly because both sides are held by serious people.
The case against. Eucalyptus is a heavy drinker, and the concern is that large plantations lower the water table in a country where the dry season already stretches supply thin in some regions. There is also an allelopathy argument — that the litter suppresses what tries to grow underneath, so a plantation is a poor substitute for forest even where it looks green from a distance. And it is not native, in a country that has built its identity around what is.
The case for. Costa Rican forestry researchers have pushed back on the water claim specifically. Writing in Kurú: Revista Forestal, the forestry school journal, Francisco Rojas Rodríguez argued that there is no proven scientific evidence that eucalyptus plantations dry up water sources or sterilise soil, and that what he called ecological myths were responsible for eucalyptus planting practically stopping in Costa Rica. On this view the country turned away from a genuinely useful timber and pulp tree on the strength of a belief rather than a finding.
Both things can be true at once: that the sweeping claim is unproven, and that planting a thirsty exotic in quantity in a dry watershed is still a decision that deserves care. What is not in dispute is that Eucalyptus deglupta has a low invasion risk here — it needs too much water to escape and spread on its own.
Should you plant one?
Almost certainly not, and the reason is size rather than politics.
This is a sixty-metre tree with a trunk that can pass two metres across. It is a plantation and parkland tree, not a garden tree. On a normal residential lot it will outgrow the space, drink hard from the ground around it, and drop limbs from a serious height.
The colours also need a big trunk to be worth having. A specimen kept small is a specimen that never does the thing you planted it for.
If you have several hectares of wet lowland and a reason to reforest, it is a reasonable choice and always has been. If you have a garden in the Central Valley, the honest answer is that you want to visit one, not own one.
Planning to stay long enough to watch one grow
A rainbow eucalyptus takes decades to become the tree in the photographs. Residency takes rather less.
CRIE — Costa Rica Immigration Experts handles residency applications, renewals, permanent residency and citizenship for people settling in Costa Rica.
See the types of residency in Costa Rica, or get in touch.
Botanical detail from the Royal Botanic Gardens Kew and the Costa Rica Tree Atlas. The eucalyptus debate is summarised from Rojas Rodríguez, Kurú: Revista Forestal, Instituto Tecnológico de Costa Rica.
Article by Glenn Tellier (Founder of CRIE and Grupo Gap)
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