First-time exhibitor Kevock Garden Plants will showcase a range of rare alpines collected on plant expeditions to the Himalayas, Alps and Andes.
Owners Stella and David Rankin have planned a special exhibit featuring woodland plants such as Meconopsis, Primula, Semiaquilegia, Ourisia and Chiastophyllum.
Birmingham City Council will put on a display inspired by American zoologist Dian Fossey featuring a range of tree ferns such as Dicksonia antarctica, Euphorbia pulcherrima and Pandanus.
Amateur grower Dave Green will be exhibiting exotic flora from South America, based on his trips to Bolivia, Columbia, Ecuador and Peru.
Plants on show include the Columbian Brugmansia sanguinea subsp. vulcanicola, which features unusual slender pink trumpets.