Buy botanical watercolour for the story. Keep it for soft green. The story is a garden hydrangea caught mid-summer, painted wet and fast so the white heads stay light and the leaves run into each other. On the wall it does something simple and useful: it cools a warm room down and gives a plain painted wall somewhere to rest. Hang it above a bed, a sofa or a low sideboard, at eye level, where daylight reaches it. It sits happily with linen, painted cabinetry, rattan and cream stoneware. Don’t crowd it with strong graphic prints or hot brights the soft edges lose their effect next to hard lines. Printed on premium fine-art paper, so the pale washes keep their depth.