This perennial vine is free flowering with 6- to 8-inch, rich and luminous, crimson flowers with a central cluster of 6 to 8 dark anthers, usually overlapping at the base. Young flowers bloom crisp and star-shaped, but as they age, they grow big and billowy. Summer flowering, it blooms June to July and again in September, but more established plants tend to flower almost continuously from early summer to early autumn.
The flowers last longer and have better color if they are partially shaded from the hottest afternoon sun, especially in warmer climates.
The plant is cold hardy (to Zone 4) and very vigorous; however, it tops out at 10 feet high and 2 feet wide and can be easily managed, so it can even be grown in a large container. It's lovely growing on a climbing rose, nimbly vining around the sturdy canes, flowering just as the rose blooms begin to wane. The plant attracts hummingbirds but repels deer and rabbits.
Clematis Cardinal Wyszynski needs a supporting structure to grow properly but will also grow over large shrubs, over walls, cover stumps, and make perfect cover ups for unsightly service areas.
Clematis Cardinal Wyszynski is easy to grow in a rich, porous, alkaline soil with plenty of room for the roots to spread. Best performance is when the tops are in full sunlight and the roots are shaded, so apply generous mulch or a shallow-rooted ground cover near the base of the vine.
Picture examples of what your plant will look like grown