Spring hails the start of the gardening year for many, with warmer temperatures and some rays of sunshine peeping through. The spring woodlanders are pushing up through the soil and starting their short-lived flowering season before the tree canopies unfurl. For many, classics such as daffodils, tulips and the ephemeral cherry blossom will grace us with their presence now, but there are some more unusual candidates which are so often overlooked, yet make perfectly good garden plants.