Is that the foliage of it in the picture? The head looks like Callistephus. If it is its an annual I'm afraid so will have to be grown from seed each year. There are many strains, some short, others tall for growing as cut flowers as they last so long in water. Their common name is China Aster.

fractal, i have uploaded another picture so that i don't have to answer your question about foliage. what is foliage? i believe with foliage you mean leaves.

how do i take the seeds from flower and at what time?

You will have to wait for the flowerheads to go to seed and then collect them - if Fractal's ID is correct, this is an annual, and may seed itself around anyway. And foliage does mean the leaves.

Yes, leaves.

Its definitely Callistephus. I have not collected seeds off these before. If its the only one you have it may not produce fertile seed by itself (self sterile). However, if the flower heads are left after flowering until they turn brown (remove faded petals as these unnaturally double forms can rot in wet weather). Gently pull apart the head after drying and if any achenes (seeds) have formed, they will drop out from the head. Store in cool place in envelope (clearly labelled) and sow in march.

Thanks very much.