Acacia concurrens | ‘Black Wattle’, ‘Curracabah‘, ‘Late Flowering Black Wattle’ | 25 seeds
Acacia concurrens (syn. Acacia cunninghamii, Racosperma concurrens) is an evergreen shrub or tree of the Fabaceae family, native to Queensland, eastern Australia. It’s also another of our UK exclusives!
Informally known as the ‘Black Wattle’, ‘Curracabah’ or ‘Late Flowering Black Wattle’, concurrens is similar in appearance to species such as Acacia disparrima and Acacia leiocalyx, as well as closely-related to Acacia maidenii, Acacia obtusifolia and (the extremely rare) Acacia phlebophylla. Intermediates between concurrens and leiocalyx have sometimes been reported in the wild.
Covered in fibrous, fissured grey-black-brown bark, concurrens grows single-stemmed and erect or spreading, averaging between three to ten metres tall. Smoothly hairless, angular branchlets form from the plant’s main trunk, from which sprout smooth, elliptic to narrowly elliptic phyllodes (essentially flattened leaf stalks). These longitudinally-veined phyllodes reach roughly ten to seventeen centimetres long by twelve to sixty centimetres wide. Three to eleven-centimetre-long spikes of pale to bright yellow flowers appear between July and September, followed by straight to twisted, papery or leathery seedpods, approximately six to thirteen centimetres long and two to four millimetres wide.
The species is quite common to coastal areas, where it grows in or on forests and woodland, heaths, hillsides, plateaus and shrub-land – usually over shale – in sandy loam or soil. Like many other Australian Acacia, Acacia concurrens is highly successful in otherwise disturbed habitats, mainly due to its ability to fix nitrogen in the soil. It’s also a valuable resource for creatures including bees (who use it as food), birds (who eat the seeds) and butterflies (who make it a host plant for their larvae). Concurrens is also useful as a source of food and materials and as a honey tree, notably to certain Aboriginal tribes.
‘Curracabah’ is well-suited to growing in the style of its fellow Australian Wattles, hence benefits greatly from germination pre-treatment. Lightly scarify the seed prior to sowing, or else soak it overnight in hot water. Tamp each seed roughly five millimetres below the (sandy or loamy) soil’s surface, making sure to keep conditions moist but well-drained until the young plants are established. Introduce to full sun or sun to partial shade, spacing plants at least three metres apart if planting in the ground. Based on its related species, we’d expect concurrens to be suitable to cultivation between USDA Hardiness Zones 8-11.
Keen to expand your Acacia collection with something a little noveler? You could do far worse than ordering some of this quality Acacia concurrens seed if so!
All the seed sold by Arkham’s Botanical was freshly and ethically sourced in 2018