Piilu™ (‘Kivso’), which translates as “little duckling,” has pretty bicolored flowers with pale purplish pink margins and deep pink central bars. I’m particularly impressed by its prodigious flower production—it’s one of the most floriferous clematis I’ve ever grown. The open-faced flowers, 3 to 4 inches wide, are produced from early to late summer and are nicely distributed over the entire plant. The early flowers are supposedly semi-double, but I’ve only seen single flowers on our plants. This is a strong climber, reaching 6 feet tall with a narrow but full habit. For pruning purposes, Piilu™ blooms on old wood, so it can be lumped into group 1 or 2. This also means that it will flower earlier if there is no winter injury to the stems. -Richard Hawke, Big blooming clematis, Fine Gardening #146, page 51