Matching is overrated in a nature inspired bedroom. The quieter achievement is coordination: muted green walls set a shared color direction, while botanical bedding, light wood furniture, and woven accents introduce enough variation to keep the room from looking assembled from a single catalog. Nothing needs a twin.
Color does the heavy lifting, but it need not do it alone. The green of a wall can differ from the leaves on a duvet, provided the shades feel related rather than jarringly opposed. This is a question of undertone, the subtle warmth or coolness beneath a color, as well as value, its relative lightness or darkness. Light wood offers a gentle contrast to the walls without competing for attention; a woven basket or shade adds a warmer note. The palette stays legible. It is not locked down.
Texture supplies the interest that a limited palette might otherwise lack. Smooth painted walls sit beside the visible grain of wood and the irregular surface of a woven accessory, allowing each material to register differently even when their colors are subdued. Pattern needs similar restraint: botanical bedding can be the most detailed element, while plainer surfaces give its leaves room to stand out. A second pattern can work if its scale differs from the first and its colors stay within the established range. There is no need for perfect symmetry. In the space between one leaf and the next, the room finds its calm.