Kudsu is free for the asking and it will grow fast. Full sun or partial? As you know most vines look terrible in the winter. What about juniper? Evergreen. Blue Pacific did wonders for me, but they need sun and a good soil base. When you plant whatever you decide make certain to moisten the area 48 hours beforehand because it will easier digging.

Here is a link that might be useful: Propagating Perennials

If you were asking SOLELY for vines, this misses the mark. But Googling, I found this cut and paste list of clay tolerant plants that might be of use:

Achillea will grow anywhere.
Aconitum or monkshood is a classic lover of heavier soils.
Alcea or Hollyhocks surprisingly grow well on clay soils
Amsonia should do well on clay.
Anchusa is good once established and protected from slugs (slugs like damper soils and they love anchusa).
Anemone are excellent perennials for clay soils and will thrive and flower well on clay. The taller varieties are excellent.
Asters will grow anywhere. Clay or concrete does not matter to this plant.

Bergenia should be fine.
Brunnera macrophylla should do well although IÂm not sure about the newer hybrids.

Campanula the taller species do better than shorter, so try C persificolia. YouÂll find variations between varieties. ÂLoddonÂs Pink apparently does well but "Telham Beauty is variable.
Chrysanthemum (Shasta Daisies) do well enough although they will be shorter-lived on clay than in well drained soils.
Coreopsis verticillata is the best in clay. Forget all others.

Doronicum spring bloomer, one of the earliest of yellow daisies.
Digitalis or foxglove  scatter the seed and let nature take its course.

Echinops make good clay soil plants. These things will grow anywhere but in a closet.

Geranium: most of the geraniums will tolerate clay soils.

Helenium are very showy daisies and they will grow handsomely on clay soils.
Helianthemum or perennial sunflowers will grow nicely. Heliopsis is another of the perennial sunflowers and it too grows well.
Hellebore surprisingly enough are listed as surviving quite nicely.
Hemerocallis (daylilies) are great on clay. They do take a little longer to become established but canÂt be killed.
Heuchera are great perennials for clay soils and this is a relief given the amount of semi-shaded clay around.

Iris germanica or flag iris will grow on heavier ground although many of the species iris will not.

Kniphofia will tolerate clay.

Lysimachia will tolerate heavy soils as well but given the fact that you can grow this plant in asphalt and not kill it.
Lythrum will do quite nicely but banned as invasive in most states.

Monarda or beebalm survive and thrive on the regular moisture of clay.

Rudbeckia, the biennial forms will live on clay as will the taller species such as ÂHerbstonne and even the most popular ÂGoldsturm will be fine.

Salvia nemerosa is reputed to do well on these soils but other salvia are very short-lived and are to be considered as annuals.
Senecio are long-lived.
Solidago will live quite comfortably and this is a good thing.

Thalictrum is a good plant and will do well.

Verbascums will tolerate clay but they are short lived at the best of times.

I have a second residence in the Ardennes. Here there is alot chist & little soil ----- how do you suggest I improve it. Vines grow very well I must say