Clematis come in an array of colors, but one variety with purple flowers -- 'Jackmanii' -- is among the most well known. It's one of the most floriferous, showing off its display of purple flowers on and off all summer long. Note: Plant several types of clematis together on a wall or arbor to extend the bloom season. Name: Clematis 'Jackmanii' Growing conditions: Moist, well-draines soil that's rich in organic matter.
Clematis (pronounced CLEM-uh-tis) Jackmanii - darkest purple of the clematis varieties. Grows in zones 4-8. Rule of thumb for clematis: keep the vine & foliage in the sun, but the root area in the shade.