Polwarth is a breed of sheep that was developed in Victoria (Australia) during 1880. They were of one-quarter Lincoln and three-quarters Merino bloodlines. They are large, predominantly polled sheep with long, soft, quite fine wool and produce good meat carcasses. They were developed in an attempt to extend the grazing territory of sheep because the Merino was found lacking in hardiness in this respect. A dual-purpose (meat and wool) breed with a major emphasis on wool production. Richard Dennis, of Tarndwarncoort in south west Victoria, bred the Polwarth, first known as Dennis Comebacks. Descendants of Richards Dennis continue to grow Polwarth wool at Tarndwarncoort maintaining the original bloodlines in a flock referred to as the "Blue Dots".
Polwarth wool is well regarded for its application in woolcraft. The longer staple length up to 130mm makes it easy for handspinning and felting. Millspun yarns that made solely of Polwarth wool are commercially available.
Polwarth sheep were developed with white wool, however, natural black, brown, grey wool flocks have expanded the popularity of Polwarth wool for craft.
Mature ewes weigh 50 to 60 kg (110 to 130 lb) and mature rams weigh 66 to 80 kg (146 to 176 lb). Ewes are excellent prime lamb mothers producing lambs that have good lean carcases. The high yielding fleeces weigh an average six to seven kilograms, with a fibre diameter of 23 to 25 microns (58–60s).
The Polwarth Sheepbreeders' Association of Australia was formed in 1918 and the studbook closed in 1948.
Polwarths are now mostly found in the higher rainfall regions of south-eastern Australia that have improved pastures. Polwarths have been exported into many countries, including South America where they are known as Ideals. Polwarth and Corriedale also form the main sheep breeds on the Falkland Islands.
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- "Polwarth: Origin and History, Bred from the Past for the Future". Sheep Breeds. New Zealand Sheep Breeders Association. Retrieved 2014-02-18.
- Hone, J. Anne. "Dennis, Alexander (1811–1892)". Australian Dictionary of Biography. Australian National University. Retrieved 19 April 2015.
- Preparation of Australian Wool Clips, Code of Practice 2010-2012, Australian Wool Exchange (AWEX), 2010
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- Stephens, M (et al.), Handbook of Australian Livestock, Australian Meat & Livestock Export Corporation, 2000 (4th ed.), ISBN 1-74036-216-0
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