Dieffenbachia 'Sublime'Vibrant foliage! The Dieffenbachia 'Sublime' has one characteristic that the whole species shares. Speckled, light and dark green, white, cream coloured: this plant has it all! The Dieffenbachia is easy to care for. Water the plant once a week. You can do this more often in the summer. The plant does like light, but not strong, midday sunshine. Morning and evening sunshine, however, are fine for this plant. Place the plant in a warm, humid place,