Eucalyptus Species, Coolibah, Flooded Box, Tiny Capsule Eucalyptus, Old Gum Tree

Eucalyptusmicrotheca

Family
Myrtaceae (mir-TAY-see-ee)
Genus
Eucalyptus (yoo-kuh-LIP-tus)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Evergreen
Shiny/Glossy
Height
30-40 ft. (9-12 m)
Spacing
12-15 ft. (3.6-4.7 m)
15-20 ft. (4.7-6 m)
20-30 ft. (6-9 m)
30-40 ft. (9-12 m)
Hardiness
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)
Bloom Color
Pale Yellow
White/Near White
Bloom Time
Mid Summer
Other Details
Category
Trees
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color
Bronze
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
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
Propagation Methods
From seed; sow indoors before last frost
Seed Collecting
Bag seedheads to capture ripening seed
Allow seedheads to dry on plants; remove and collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Phoenix, Arizona

Ocala, Florida

Manteo, North Carolina

Ivins, Utah

Saint George, Utah(2 reports)

Washington, Utah

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Gardener's Notes:

1
positive
0
neutral
1
negative
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U
Salt Lake City, UT (Zone 7b) | September 2021 | positive

I’ve seen quite a few large healthy Eucalyptus microthecas in and around St George, UTAH (zone 8b/9a). They look absolutely flawless an...Read More

S
Austin, TX (Zone 8b) | September 2011 | negative

Dead at 16f after a 3-day freeze.

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