Geranium 'Patricia', I love the magenta zing of these flowers which come from June for a couple of month. The plant makes a nice rounded low clump which contrasts nicely with the spikier plants. I suggest three or four of these repeated at intervals so your eye is drawn down the border. For middle of the border
Penstemon 'Andenken an Friedrich Hahn' - Elegant spikes of small, tubular, foxglove-like flowers appear from July to October among lance-shaped, bright green leaves. This vibrant, easy-to-grow perennial commemorates an 18th century German astronomer. It will quickly form large, leafy clumps and is perfect for adding a splash of colour to the middle of a sunny, well-drained border.
Hardy Geranium hybrid Patricia : Very deep dark magenta pink flowers. Hardy Geraniums are perfect for bedding in the borders as they come back with colour year after year! They naturally spread so once you have had them in the garden for a couple of years you can divide them up and have even more plants! Height: 75cm (30"). Spread: 40cm (16").
a new geranium for partial shade, Geranium 'Patricia'. Shorter and repeat flowering hybrid of G. psilostemon with large leaves and stunning Autumn leaf colour. It was raised in the Orkneys by Alan Bremner and named after Patricia Doughty. It has large magenta flowers with a dark centre over most of the summer.