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Eucalyptus punctata – Eucalyptus gray gum, iron gray gum, gray irongum, gray gum

Botanical nomenclature: eucalyptus punctata
Common name: eucalyptus gray gum, iron gray gum, gray irongum, gray gum
Family: myrtaceae
Origin: Australia
Brightness: full sun
Height: 35 meters

1.92

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Description

The species has its common name due to the color of the bark of its trunk reached even when it is very young, about 1 year old, usually with a mix of gold, copper, salmon and various shades of gray; according to photos at the end of the description.

Large eucalyptus, which usually reaches 35 meters in height.

Eucalyptus that provides extremely hard and durable wood that is used in construction and for sleepers.

The multicolored bark of this species gives it a very ornamental aspect, marbled or like a granite stone, making its application cross other cultural aspects, and not only extraction, but also, its use as an ornamental species for decoration and planting in gardens.

Species resistant to frost, drought and poor nutrition, fast growing soils, very durable wood and widely applied in heavy engineering and an important source of pollen for beekeeping.

*** Additional Information:
It occurs naturally in the central region, along the coast and coastal mountains of new south wales, Australia. This area is between sea level at 1,000 m. The average annual rainfall varies from 625 to 1,250 mm. The rainfall regime is characterized by a uniform distribution throughout the year, or by concentrated rain in the summer. The dry season has an average duration of 4 months. Average temperature of 4 months from the highest of the hottest month between 27 to 32ºc, and the minimum of the coldest month between 4 to 5ºc
The frosts occur in an intensity of 1 to 10 days / year. Wood is highly recommended for sawmills, structures, posts and sleepers. It regenerates well by sprouting the strains.

A very ornamental specimen, which during the period of 1 year colors and mixes its trunk in three different ways.

Its leaves are part of the koala diet.

A special purchase for our gardens and for other purposes.

Germination Guide

🌍 Southeastern Queensland to northeastern New South Wales, Australia
Moderate

Eucalyptus punctata, commonly known as grey gum, is a subtropical tree species native to eastern Australia where it grows in sclerophyll forests. Seeds germinate best with cold stratification for 2-4 weeks at 4°C, followed by warm conditions of 18-27°C with moderate humidity. Germination typically occurs within 14-30 days under proper conditions.

Germination
Germination time
Expect germination in

14 – 30 days

Temperature

Min 18°C
Ideal 21°C
Max 27°C

Light
☁️ Indifferent

Substrate moisture
💧 Medium

Sowing depth
Lightly covered

Germination rate
70 %


Seed Pre-treatment
  • ❄️


    Cold stratification — 30 days at 4°C
  • 📋

    Additional notes
    Store dry seeds at 3-5°C to extend viability for 3-5 years. Pre-stratify seeds for 2-4 weeks in moist medium at 4°C before sowing for better germination consistency.

Substrate & Container
Recommended substrate
Vermiculite and coco fiber (50/50), peat and perlite (50/50), or commercial seed germination cells. Avoid heavy soils; use well-draining substrate.

Recommended container
Cell trays (128-cell or larger), seed pans, or plug trays with drainage holes


Growing Tips
Sow seeds on surface or lightly cover with fine vermiculite; do not bury. Keep substrate consistently moist but not waterlogged using a spray bottle. Provide bright light after germination. Maintain humidity with vented propagation domes until 80% germination achieved, then remove dome to prevent damping off. Bottom heat is not necessary and may hinder germination. Transplant only when seedlings develop 3-4 true leaves. Water from below, never from above, to prevent fungal issues. Protect young plants from direct sun with 50% shade cloth for 2-3 weeks after germination. Eucalyptus seedlings are slow-growing initially; handle with care to avoid root disturbance, as they are sensitive to transplanting.

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