1881 C. Whitehead 8 The plant centres being covered with a few shovels of earth.
1894 x. 4 These traps..should be placed close to the [hop] hills or plant-centres.
1995 (Royal Hort. Soc.) Nov. 730/1 The plant centre is open..each day..and the skills and art of wood-turning will be demonstrated on the weekend of 11–12 November.