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Clematis atragene (Group)

These are a robust and early flowering clematis group that opens the clematis season each year (as they are the first to flower). They can also thrive in shaded locations, which is why we have included one cultivar in our assortment: Clematis alpina / sibirica x macropetala "Blue Bird"-- their lavender blue flowers open completely. For trellises that are 2 to 4 metres high. Currently not available. 

>>> Price

(This group consists mainly of Clematis alpina and Cematis macropetala.) 

Clematis alpina "Blue Bird," bred by Dr. Frank Leith Skinner / Canada 1967
Clematis alpina "Blue Bird," bred by Dr. Frank Leith Skinner / Canada 1967

Requirements / Price

The location can be sunny to shaded, but not near hot south-facing walls. The soil should be fresh, humus-rich, with good drainage. Avoid heavy clay ('loamy') soils. Protection from wind and a shaded trunk base are optional for these clematis. Planting distance: 0.8 to 2.5 metres. >>> Price

Characteristics and Pruning

Petiole ('leaf tendril') climbers. The roots are fine, so be cautious while planting. Clematis atragene are highly frost-resistant and relatively resistant to clematis wilt. They also tolerate dryness to a degree. Growth is moderately vigorous and the moderately dense foliage will last from April to October, with fine leaves. Growth height is approximately 2 to 4 metres. Flowers of the 'Blue Bird' are lavender blue with 4 + 4 petals (see photo above), and the flower is completely opened. The colour fades to steel-blue, flower diameter is 6 to 8 cm, the flowering period is April - May (flowers are frost-hardy), and a second flowering may occur in August or September. The seed heads/capsules are fine, silvery, and ornamental. "Blue Bird" is propagated seedless to preserve the flowers' unique characteristics. Prune (thin out) just after flowering, around late May  (pruning method 1). 

Climbing Aids for the Facade

Choose a closely arranged wire rope trellis (25 - 35 cm grid). Vertical axes should dominate so that the trellis forms 'standing rectangles' instead of squares. See the bottom of the page for a table indicating suitable trellis shapes and sizes. Our 5050 wire rope trellis is a good choice and can be used with steel rods. Easy kits (basic and basic-s) are enough, sometimes the mini or light designs may be sufficient, but a trellis in the medium range allows for optimal development.

Suitable Wire Rope Trellis?

Click on the image to see which designs are compatible as a climbing aid with clematis atragene.

Greened lamppost, flowers right before opening
Clematis alpina on a mast, wild variety with only four petals and flowers that won't open entirely
Clematis atragene on a house facade, flowers are fading (steel blue)
Clematis alpina on a garage window

Suitable wire rope systems for clematis atragene

Please click on the graphics to see a detailed view of each design!

 = suitable        = sometimes suitable       = not suitable