John Dominy was a British horticulturist and plant hybridiser. He is best known as a gardener at the Veitch Nurseries, where he worked most of his life, first at James and James Veitch in Exeter (1834–1841) and later at the group's Chelsea-based business. In 1856 Dominy flowered the first known manmade orchid hybrid, Calanthe Dominyi. He is also noted for hybridising Nepenthes and fuchsias. During his time at the Veitch Nurseries, Dominy mentored John Seden, who would go on to become a distinguished hybridist in his own right.