Fabulously flamboyant and in bloom for months on end, summer-flowering bulbs can fill your borders, pots and vases with an abundance of colour. Dahlias for example come in a colossal array of shapes, sizes and colours, so there really is something for everyone. Capable of flowering from July to November, they're always fabulous - and they'll also last for a week or more if cut for the vase. Other summer-flowering bulbs not to be missed are exotic-looking (and often highly scented) lilies, glorious peonies, the retro-tastic gladioli, and long-flowering begonias. Packed with potential, they're all ready to be potted up and started off now.