Harold Basil Christian (28 October 1871 – 12 May 1950) was a South African-born Rhodesian farmer, horticulturist, and botanist. Christian attended Eton College in the United Kingdom, where he was a distinguished athlete. He served in the Imperial Light Horse of the British Army during the Second Boer War, during which he fought in the Siege of Ladysmith. In the decade after the war, he worked in what is now South Africa for De Beers and later as an engineer for a mining company. In 1911, Christian moved to Rhodesia (today Zimbabwe). There, he purchased a sizable farm, which he named Ewanrigg. He was best known for his study and cultivation of aloe on his extensive estate, which was donated to the state upon his death and became a national park.