NZ Gardener Best indoor plants for your bathroom American indoor plant-obsessive Hilton Carter’s lush and lovely new book suggests the best indoor plants for bathrooms. 2020-06-01 - Tips from a new book. Tradescantia zebrina. Creeping fig ( Ficus pumila) and Nephrolepis cordifolia ‘Lemon Buttons’ [the latter is a pest plant in New Zealand, use Blechnum ‘Silver Lady’ instead].