Pilea Pepperomoides in Gourd PlanterLarge is 8 9 wing span on mature pilea plant Water 1 2 3 4 cup weekly in summer, winter cut back to 1 4 1 2 cup every two weeks. bright indirect light. Afternoon sunny window is ideal, but no outside sun. Medium 6 7 wing span of plant or width of planter, water 1 2 cup weekly in summer, winter cut back to 1 4 cup. Small 4 5 wing span of plant or width of planter Water 1 4 1 2 cup weekly in summer months, winter cut back to 1 4 cup every two weeks.