Attractive dark mahogany-red flowers set off against plain green foliage. One of the quickest species to form a good clump. RHS Award of Garden Merit winner. Flowers in April. Height 30-38cm. Root size 1. Many gardeners see a shady corner of their garden as a problem area, but there are a whole host of amazing varieties that will positively thrive there, making it actually a really good opportunity to grow something different. & many of those same plants are great for naturalising too!