Easier to grow than you may think, cannas are one of those exotic beauties that swiftly helps to create a bright, intensely coloured summer garden.With large, banana shaped leaves, their fiery, hot colour combinations will erupt throughout your beds and borders, adding great height and impact too. 'Tropicanna' produces foliage which is striped in a rainbow of colours with greens, purples, oranges and pinks, creating a dazzling effect that is further enhanced when the orange flowers appear. Renowned for their tall flower spikes and architectural leaves, grow them in large pots, or at the back of hot-themed borders, in hot, sunny spots, in well-drained areas. Feed and water well when in growth - they will not start growing much until May, then they romp away quickly as the summer warms. Cannas will over-winter if they do not get too wet and will benefit from a mulch, or the tubers can be dug up and stored in a cool, frost-free place over the winter for use again next year. Features and B