Description
The shrub has a spreading habit and typically grows to a height of 3 m (9.8 ft) and a width of 4 m (13 ft). The large grey-green phyllodes have an ovate-lanceolate shape with a length of 10 to 25 cm (3.9 to 9.8 in) and a width of 2 to 9 cm (0.79 to 3.54 in) and are covered with white silky hairs, with three to four prominent veins. The flowers are rod-like and bright yellow, 3–5 cm long. The thinly crustaceous seed pods that form after flowering are tightly irregularly coiled and have a width of 2.5 to 4 mm (0.098 to 0.157 in). The pods are 3 to 5 cm (1.2 to 2.0 in) in length and twisted and curled. The shiny dark brown seeds are arranged longitudinally in the pods and have an obloid-ellipsoid shape and are 3 to 5 mm (0.12 to 0.20 in) in length with a bright yellow aril. The seed is edible.
Germination Guide
🌍 Northern and north-central Australia (Queensland, Northern Territory, Western Australia)
Moderate
Acacia holosericea, commonly known as Candelabra Wattle or Soapbush Wattle, is a spreading shrub native to tropical and inland northern Australia. This species features distinctive silvery-grey phyllodes and bright yellow flower spikes that appear in winter. Seeds have a hard, impermeable seed coat that requires pre-treatment to achieve rapid and uniform germination.
Germination
Germination time
Expect germination in
10 – 21 days
Temperature
Min 18°C
Ideal 20°C
Max 22°C
Substrate moisture
💧💧 High
Sowing depth
Lightly covered
Seed Pre-treatment
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💧
Soaking — 18 hours
Immerse seeds in warm water for 12-24 hours to break dormancy. Hot water treatment (boiling water) for 1 minute can also be effective.
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🔨
Mechanical scarification
Gentle mechanical scarification on seeds that do not swell after soaking. Repeat the soaking process after scarification.
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📋
Additional notes
Immerse seeds in warm water for 12-24 hours. Seeds that do not swell may be gently scarified and the soaking process repeated. Alternatively, brief exposure to boiling water (1 minute) can enhance germination.
Substrate & Container
Recommended substrate
High-quality seed raising substrate that is light, porous, free of pathogens, and well-draining
Recommended container
Transparent plastic container with lid or sow 3-5mm deep in moist seed-raising mix
Growing Tips
Sow seeds in a well-lit location but avoid direct harsh sunlight; use fluorescent lighting if necessary. Keep substrate consistently moist with a transparent cover to maintain humidity. Germination is more reliable at cooler temperatures (18-22°C) compared to standard tropical temperatures. Do not discard non-germinated seeds prematurely as some may remain dormant until conditions match their natural germination requirements. Acclimatize seedlings gradually before transplanting to permanent locations.
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