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PlantFiles: Blue Gum, Southern Blue Gum, Tasmanian Blue Gum
Eucalyptus globulus

Family: Myrtaceae (mir-TAY-see-ee) (Info)
Genus: Eucalyptus (yoo-kuh-LIP-tus) (Info)
Species: globulus (GLOB-yoo-lus) (Info)

2 vendors have this plant for sale.

4 members have or want this plant for trade.

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over 40 ft. (12 m)

30-40 ft. (9-12 m)
over 40 ft. (12 m)

USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun

Parts of plant are poisonous if ingested

Bloom Color:
White/Near White

Bloom Time:
Late Spring/Early Summer


Other details:
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)
8.6 to 9.0 (strongly alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
Direct sow as soon as the ground can be worked
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Collect seedhead/pod when flowers fade; allow to dry
Allow pods to dry on plant; break open to collect seeds
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored

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4 positives
1 neutral
No negatives

Gardeners' Notes:

Positive RosinaBloom On May 15, 2014, RosinaBloom from Waihi
New Zealand (Zone 1) wrote:

The Southern Blue Gum has been known to reach up to 330
feet. They are often seen in our New Zealand pastoral landscape.

Neutral baiissatva On Oct 17, 2008, baiissatva from Dunedin
New Zealand wrote:

Zone 9b Coastal Otago New Zealand

Our property is surrounded by a hulking feral posse of these gigantic gums- but I dont really mind - Im a fatalist when it comes to having our roof crushed by stray limbs. :-)
From a sheer cliffside the gum out in front has grown about 20m in 12 years. Off to the east an existing behemoth tops out at 40ms and is currently (mid spring) smothered in a tiered canopy of huge creamy yellow flowers, with resulting avian attention.
They regularly 'self prune', dropping huge dead, and sometimes live, limbs without warning. I imagine the habit is much worse in a region with wood-boring insects.
They self seed with gay abandon, the seedlings going straight up with juvenile foliage for about 6 ms before branching and taking on an adult look. Cut them before this stage and they make wonderful fencing rails etc, due to the straightness and durability of the timber.
If youre looking for a firewood tree, this is a superb choice- the wood is hard, dense, easy to split when dry and hot-burning. They drop so much wood you dont even really have to cut them down.
They do drop ribbons of bark but we dont notice any problem with underplanting; many natives seem to enjoy the shelter they provide.
Indifferent to soil type, withstands a lot wind- our location is sea-side and very exposed to regular 100km blasts. Come to think of it, I cant say Ive ever seen a Tassie blue gum on its side anywhere. With their massive scale theyre great for drying out a boggy area and rendering it plantable for other trees.
Plant them in a group on a larger property (as much for their utility as their looks)- they have a very dignified silhouette and the flowers are wildly popular with local fauna. Eucalypts love company, which is something many people either dont know or ignore. They do so much better in groves.
Just remember- this is one of the worlds largest trees and they dont care about your scowling out the kitchen window at their wanton enormity- consider yourself warned!

Positive Lodewijkp On Jun 1, 2008, Lodewijkp from Zwolle
Netherlands (Zone 7a) wrote:

nice euc


Certainly one of the fastest growing eucalyptus.
Nice Fragrance
Nice color and foliage
Can grow in any soil as long it isn't very fertile.
Drought tolerant, water tolerant.
Easy to sow, even old seeds wil germinate in 3 weeks.
Nice flowers
Attracts alot of wildlife
No pests or diseases and can repel some insect by it's fragrance


Not reliable hardy
too fast growing for container, becomes rootbound very quickly and never recovers.
Grows too fast , the stem is not hardened enough versus wind.
Fertilizer or very fertile soil wil make it grow top heavy.
not for windy sites.
grows too large to shelter in winter zones 8 and 7
can lift structures when grown to close to.
Never plant or grow it next to infrastructure or elecric systems.

The special oils in the leaves can kill most species of plants growing under or nearby, mulch the ground with pine needles or bark and clear the ground of any euc leaves.
Allow the seedpods to dry for a long time until they crack.

Positive airren On Feb 13, 2004, airren from Alabaster, AL (Zone 7b) wrote:

I grew a couple of these from seed during the summer. Six months later they are both six feet tall plus. I live in mid Alabama, and though these monstrosities are not supposed to tolerate our winters, I'm planning on planting them outsite in April just to see how big they will get until frost (they live in the greenhouse now and they're approaching the ceiling!). When these trees are young their leaves are really beautiful grey/green.

Positive palmbob On Feb 2, 2004, palmbob from Acton, CA (Zone 8b) wrote:

Truly massive species with a huge, twisted trunk and up to and sometimes over 200' tall. This Tasmanian native is planted commonly as an avenue tree in the Los Angeles area, particularly along athletic fields. It is messy tree with peeling bark and a constant leaf litter. THe bark is a pale color and the leaves a dull green. Reportedly in the heat of day, the leaves give off essential oils and from a distance this gives the sky line a blue tinge. There is a mountain range in New South Wales called the Blue Mountains for this reason (per a contributing member from Down Under- thanks!).


This plant has been said to grow in the following regions:

Malvern, Arkansas
Canoga Park, California
Hayward, California
San Leandro, California
Morehead City, North Carolina
Raleigh, North Carolina
Columbia, Tennessee

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