Thomas Affleck, planter, son of Thomas and Mary (Hannay) Affleck, was born on July 13, 1812, in Dumfries, Scotland. He studied agriculture at the University of Edinburgh before coming to the United States, where he arrived on May 4, 1832. On April 19, 1842, he married Anna Dunbar Smith, the niece of Jane Wilkinson Long, at Washington, Mississippi, where he established one of the earliest nurseries in the South and operated several plantations. In 1858 he moved to Texas and established Glenblythe Plantation and the Central Nurseries near Brenham. His Cotton Plantation Record and Account Book and Sugar Plantation Record and Account Book, prepared as a record of Glenblythe, became models for other planters in the area.
Through experimentation and publication of books and articles, Affleck contributed to the progress of agriculture in Texas and the South. From 1840 to 1842 he was junior editor and editor of the Western Farmer and Gardener at Cincinnati, Ohio. He published Bee-Breeding in the West in 1841 and in 1848 edited Norman's Southern Agricultural Almanac. Affleck's Southern Rural Almanac and Plantation and Garden Calendar had a wide annual circulation from 1851 to 1861. Hedging and Hedging Plants in the Southern States (1869) and "Report on Agricultural Grasses," which appeared as a Senate executive document in 1879, were published after his death. He made several trips to Europe to encourage English and Scottish immigration to Texas and promoted European interests in the establishment of beef-packing houses with direct shipping lines from Texas to Europe. He died at Glenblythe on December 30, 1868.