Salvia nemorosa ''Sensation Rose' (Sensation Series)' - Throughout summer, spikes carry masses of rose pink flowers, each sitting within a deeper purplish-pink calyx. Their compact, tidy habit makes them ideal for containers and window boxes, as well as creating colourful drifts towards the front of a sunny border.
Many ready made window boxes are sized more to be convenient to load into your car, than convenient for good plant growth. Undersized boxes are the devil to keep watered, once the plants have rooted in well. These boxes are 11″ wide and 16″ tall-plenty of room for a soil mass that will retain moisture evenly, and allow for root growth. A window box that is 8″ tall and 10″ long will need succulents, as they do not root deeply, and they are happy in dry soil.