Where are you in the UK Spanish, it makes a difference and what is your soil, acid, alkaline, clay, silt... Sorry more info needed to answer you correctly.

A few to think about here, i grow these in my garden and they are around about two/three foot high, Achillia, cloth of gold, clump forming perrenial, with lovely flat disks of yellow flowers that last well into autumn, and they are great for drying for arrangments, another i grow is Tanecetum, [tansy] tall, fanastic feathery foliage with clusters of yellow button like flowers its perrenial and spreads very easily and also can be used for drying, two others growing in the garden are both lysimackias, L,punctata is aprox two foot high wth lots of yellow flowers going up the stems, in flower aprox4/5 weeks and the other is L,Clethroides tallish perrenial with lovely spires of white flowers that curl slightly at the tips, and easily spreads, a smaller perrenial but has a long flower period is Sedum spectabile, lasts well into autumn, julien.

My list, hopefully adjusted for frost tolerance:
Gaura (Gaura lindheimeri), Blanket Flower (Gaillardia aristata), Lance-Leaf Coreopsis (Coreopsis lancifolia), Golden Columbine (Aquilegia chrysantha), Hardy Chrysanthemum (Dendranthemum x rubellum), and Wood's Blue Aster (Aster hybrid).

HI JUST TO SAY THANKS TO ALL WHO HELPED WITH THEIR SUGGESTIONS MY SOIL IS A BIT OF EVERYTHING I AM IN CHESHIRE SPANISH

For a quick soil check, get the soil nicely moist, take a big handful, and form it into a ball. Hold it in your palm, and poke it. If it falls apart, you have sand, or such a loose organic soil, it is like some potting composts. If it just dents, it is a clay-based soil. If it dents, cracks a little, and a few chunks fall off, it's the best kind--loam! Loam itself is usually a mix of clay, silt, and sand, usually with a fair amount of organic matter. Clay and sand can become loam-like with enough organic matter. With sand, the organic matter, usually compost, can just be laid on top to leach in, and be mixed by earthworms. Barren clay can be treated the same, but it will take longer without the compost being mixed in manually.
Acidity or alkalinity are best discovered with a test kit. A pH of 7 is neutral. Less than 7 is acid, and more is alkaline. Most plants prefer neutral to slightly acid, though a few prefer moderately acid soil (pH of 6). Many can tolerate slightly alkaline, though few can tolerate a pH higher than 8--pretty rare in the UK! Acid soil is neutralized with limestone, and alkaline neutralized with organic matter.
Hope all this helps, Spanish!