Eucalyptus mcquoidii Plant Care

Eucalyptus mcquoidii Brooker & Hopper

Updated · Sources · How we source care data

Eucalyptus mcquoidii, commonly known as the Quoin Head marlock, is a species of marlock, mallee or small tree that is endemic to a restricted area in Western Australia. It has smooth, greyish bark, glossy green, linear to narrow oblong adult leaves, flower buds in clusters of up to fifty that are fused at their bases, greenish flowers and fruit in spherical masses.

🌳Trees🌿Shrubs
Water

Every 7–14 days

Light

Full sun

Temp

50–85°F

Humidity

40–70%

At a glance

How do you care for Eucalyptus mcquoidii?

Plant Eucalyptus mcquoidii in full sun (USDA zones 12a) and water a young tree every 7–14 days until it is established. It tolerates temperatures of 50–85°F (10–29°C). Fertilize it every 6 months during the growing season. It is reported as toxic to pets, so keep it out of reach of pets.

Where Is the Eucalyptus mcquoidii Native To?

Native range1 country

What Is the Eucalyptus mcquoidii?

Eucalyptus mcquoidii (Eucalyptus mcquoidii) belongs to the Myrtaceae family within the Eucalyptus genus. Eucalyptus mcquoidii is native to a restricted area in Western Australia.

Eucalyptus mcquoidii displays a fast-growing tall tree growth habit, reaching up to 100 ft tall with a spread of approximately 50 ft. Eucalyptus mcquoidii produces small white, cream, or pink flowers in clusters.

Leaf size: approximately 6 inches.

How Often Should You Water a Eucalyptus mcquoidii?

Water a young or newly planted Eucalyptus mcquoidii every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Watering Frequency

Every 7–14 days

Until established; then in dry spells

What Light Does the Eucalyptus mcquoidii Need?

Eucalyptus mcquoidii thrives in full sun.

Light Requirement

Full sun

What Temperature and Humidity Does the Eucalyptus mcquoidii Prefer?

Eucalyptus mcquoidii tolerates temperatures of 50–85°F. Eucalyptus mcquoidii prefers humidity levels of 40–70%.

Temperature

50–85°F

Humidity

40–70%

What Soil Mix Works Best for a Eucalyptus mcquoidii?

Well-draining sandy loam with some organic matter. Good drainage is essential for Eucalyptus mcquoidii to prevent waterlogging, which leads to root rot and fungal issues.

How Often Should You Fertilize a Eucalyptus mcquoidii?

Feed Eucalyptus mcquoidii every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees in good soil often need little extra feeding, so let weak growth or pale foliage guide you.

Stop feeding by late summer so new growth can harden before winter.

Fertilizing

Every 6 months

During the growing season

The PlantoScan app can remind you when to water and when to fertilize each plant.

Where Should You Plant a Eucalyptus mcquoidii?

Choose a spot with full sun and well-draining sandy loam with some organic matter. Avoid low spots where water collects after rain.

Eucalyptus mcquoidii is suited to USDA Zone 12a.

Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.

How Far Apart Should You Plant a Eucalyptus mcquoidii?

Eucalyptus mcquoidii can spread to about 50 ft (15.2 m) and reach about 100 ft (30 m) tall. Space plants about 50 ft (15.2 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.

Planning a row or hedge? Try the tree spacing calculator.

How Do You Prune a Eucalyptus mcquoidii?

Prune Eucalyptus mcquoidii while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.

If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the tree in one year.

How Do You Care for a Eucalyptus mcquoidii in Winter?

Eucalyptus mcquoidii is frost-tender (hardy to USDA zone 12). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

How Do You Propagate a Eucalyptus mcquoidii?

Eucalyptus mcquoidii can be propagated through seeds, cuttings. Similar propagation techniques also apply to silver dollar eucalyptus plant care, which shares the same genus.

Is the Eucalyptus mcquoidii Toxic to Pets and Children?

Toxic (caution)

Reported as toxic in our plant data. Not verified by the ASPCA.

This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.

See all plants toxic to cats and plants toxic to dogs.

What Pests and Diseases Affect the Eucalyptus mcquoidii?

Eucalyptus mcquoidii is susceptible to lerp psyllids, eucalyptus gall wasp. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

What USDA Hardiness Zone Does the Eucalyptus mcquoidii Need?

Eucalyptus mcquoidii grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Eucalyptus mcquoidii is native to a restricted area in Western Australia. In cooler regions, grow Eucalyptus mcquoidii as a houseplant or bring it indoors before the first frost.

Hardiness Zone

Zone 12a

Keep exploring plants

Eucalyptus mcquoidii is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.

It belongs to the Eucalyptus genus — compare its care with other Eucalyptus species on PlantoScan.

Eucalyptus is part of the Myrtaceae plant family — browse all Myrtaceae genera and species.

Eucalyptus mcquoidii thrives in bright light and direct sun — see other bright-light plants.

More Eucalyptus Species

Other Eucalyptus species in PlantoScan's care catalogue share similar watering, light, and soil preferences:

Sources

  • Scientific name & taxonomy: Eucalyptus mcquoidii Brooker & Hopper, family Myrtaceae (first published in Nuytsia 14: 336 (2002)) — World Flora Online record, IPNI name record.
  • Pet toxicity: Eucalyptus mcquoidii is reported as toxic to pets in our plant data (not verified by the ASPCA), so treat it with caution. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
  • Hardiness zone: USDA Zone 12a, calculated from the plant's minimum temperature.
  • Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.

Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.

PlantoScan app icon

Identify Plants Like the
Eucalyptus mcquoidii Instantly

Scan any plant with your phone camera and get instant ID, care tips, water and fertilizer reminders, and health checks — all in one app.

Download on the App StoreGet it on Google Play

Free

to download

iOS & Android

platforms

Light & dark

mode

100,000+

species