Description
A medium to large tree to 30 m tall, native to northern Australia, Indonesia, and Papua New Guinea with attractive, sickle-shaped phyllodes (leaves that are actually not leaves but widened leaf stalks) and yellow, bottle-brush-like flowers in great profusion. Besides being grown as a robust ornamental and shade tree it also makes good firewood, charcoal and pulp and yields tannins and gum that are commercially exploited. The wood is also used for furniture and other purposes. Seeds should briefly be immersed in boiling water before sowing.
Germination Guide
🌍 Northern Australia, Papua New Guinea, Indonesia (Maluku Islands)
Easy
Acacia auriculiformis, commonly known as earleaf acacia or northern black wattle, is a fast-growing leguminous tree native to Australia, Papua New Guinea, and Indonesia. This multipurpose species exhibits significant seed dormancy that requires pre-treatment to achieve high germination rates. With proper pre-sowing treatments and optimal growing conditions, germination rates exceed 70-83%, making propagation relatively straightforward for experienced nursery practitioners.
Germination
Germination time
Expect germination in
7 – 35 days
Temperature
Min 20°C
Ideal 27°C
Max 30°C
Substrate moisture
💧💧 High
Sowing depth
Lightly covered
Seed Pre-treatment
-
💧
Soaking — 18 hours
Soak seeds in warm water for 12-24 hours. This standard Acacia treatment improves germination. Hot water treatment (80°C for 10 minutes) is the most effective method.
-
🔨
Hot water scarification
Immersion in boiling water (80°C) for 10 minutes achieves highest germination success (83%). Alternatively, mechanical scarification with sandpaper (78% success) or sulfuric acid treatment (75-96% success depending on duration) can be used. Seeds can also germinate without pretreatment if freshly harvested.
-
📋
Additional notes
Hot water treatment (80°C for 10 minutes) is the recommended pre-treatment for optimal germination. Without pretreatment, germination rate is only 43%. Scarification with sandpaper or sulfuric acid (5-10 minutes) are effective alternatives.
Substrate & Container
Recommended substrate
Well-draining, light, pathogen-free substrate. Mixture of topsoil, coconut husk, coarse sand, and fine sand (3:4:1:1 ratio) or blotting paper with consistent moisture.
Recommended container
Transparent plastic pots or containers with drainage holes; polybags suitable for nursery propagation
Growing Tips
For best results, use hot water treatment (80°C for 10 minutes) as the primary pre-treatment method. Sow seeds on substrate surface in well-lit conditions without direct sunlight; use fluorescent lighting if necessary. Maintain high substrate moisture using transparent lids to create humid microclimate. Provide 50% shade for newly emerged seedlings, transitioning to 70% full sunlight after establishment. Seedlings reach plantable size (25 cm height) in 3-4 months. Avoid heavy clay soils; prefer well-draining sandy or loamy substrates. Store seeds in airtight containers at room temperature for extended viability (up to 18 months or several years in air-conditioned storage).
Only logged in customers who have purchased this product may leave a review.
Reviews
There are no reviews yet.