Aquilegia Plants - Black Barlow A beautifully unique flower loved by garden designers The Aquilegia Plants - Black Barlow is a popular variety amongst garden designers. The intense double flowers produced are deep purple, almost black in colour making them perfect for creating a beautiful contrast in flower beds and flower borders. The unique colours and shape of the beautiful Aquilegia Plants - Black Barlow will create amazing flower displays on your patio. Simply plant them in an ornamental pot or container and watch them bloom into mysterious deep purple flowers. Flowering from May- June and growing to a height of 100cm (40”).