10/10/2026
Somewhere in amongst those red dots on the South West of Western Australia are our two nursery managers,including Carol Anderson two + weeks out of having a broken hip, an operation and a week or so's recovery!
What an inspiration this lady is,she is accompanied by Linda another one of our long term nursery managers.
And of course they are doing a one-weeks tour of the wildflowers of Western Australia.
This isn't Carol's first time but with all the success we're having with these WA flowers I'm sure there'll be plenty of notes taken with more new specimens being proposed into our range when they arrive home.
So it is fitting that the next shrub is from Western Australia and goes by the name One-sided Bottlebrush or Common Net Bush,and I would like to give full credit to this next article by the Australian National Botanic Gardens Canberra
Text by Carol Booth (2011 Student Botanical Intern)
Calothamnus quadrifidus
C. quadrifidus is an upright, compact or spreading, heavily-branched, evergreen shrub that grows to about 1.5 – 2.5 metres tall and a similar width. The grey-green or green needle-like leaves are about 30 mm long and 1-2 mm wide and are usually hairy giving the foliage a lovely soft appearance.
The showy flowers, clustered in one-sided spikes, are produced through all of spring and well into summer, and sometimes spanning a longer period. The brightly coloured stamens, usually in red, are the conspicuous parts of the flower and are fused together in bundles, known as staminal claws. The fruits produced are woody capsules that remain on the plant throughout its life and can contain seeds for many years.
C. quadrifidus is very adaptable to a range of environmental and growing conditions and is considered moderately hardy, tolerating windy and coastal situations. It grows naturally in a dry summer climate but will also grow in somewhat more humid conditions. C. quadrifidus is not too fussy and copes with conditions ranging from the soil becoming dry between watering to being constantly moist (but not constantly wet). It commonly grows naturally among granite outcrops, in sand or sandy-gravel, however it adapts well to other soil types such as loam, and even clay. A neutral to mildly alkaline soil is probably best, though it is known to grow also in mildly acidic soil. Whatever the soil type, better drainage will improve results.
Young plants can be somewhat frost sensitive, however established plants will tolerate frosts with perhaps only minimal tip damage. C. quadrifidus grows well in either full sun or part shade, though it favours a warm, open and sunny position, and while not being a heavy feeder, it will perform best if provided with regular additions of compost and/or the occasional application of a ‘complete’ or balanced fertiliser. Avoid over-fertilising.
Regular pruning (in conjunction with adequate nutrition) will keep this plant dense and growing vigorously. With age it can become rather woody and “leggy” if left unattended. C. quadrifidus will happily tolerate removal of up to one third of the foliage, which is best done just after flowering. Hard pruning into old wood may affect the next season’s flowering, as the flowers are borne on stems of the previous season’s growth.
C. quadrifidus is not prone to disease or attack from many pests. Scale insects can be managed by good horticultural practice such as regular pruning and adequate nutrition to keep growth vigorous, and positioning plants with good airflow. It is always best to regularly inspect plants and prune out any affected branches before populations of scale are allowed to build up.
C. quadrifidus reproduces readily by seed and ‘ripe’ fruits can be collected in paper bags and placed in warm conditions (~30°C) to release the seed, for later sowing in autumn or early spring. Softwood or tip cuttings taken in late summer are recommended if you want to propagate a particular form.
C. quadrifidus has a number of subspecies and cultivars include yellow-flowered, dwarf, and grey-green foliaged forms.
I know it's disappointing not to have these plants on hand but they must go through trials to prove that they can survive at least a good year up here in various soil types so be patient big things coming in the new year.