The likelihood of you succeeding in this endeavor is virtually nil. There's been some work done in attempting to propagate own-root nut trees from cuttings, but success rates, for the most part, have been very, very low - and that was after etiolating the candidate cuttings, using rooting hormones, bottom heat, mist bench, etc.
Superior nut trees are typically propagated by grafting onto seedling rootstock.

lucky_p, thank you very much. cutting was from grafted walnut and i wonder would this cutting be the same in growth habits like the tree i got it from or not. probably i will not succeed but say if miracle happens.

i can't afford to buy grafted walnut in price of $186.00 ,

also, i don't know how to get fresh walnuts to grow from seeds.
thank you very much

n_g,
If you were able to root your cutting, or if you grafted it onto a seedling rootstock, it would have similar growth habit to the one you got it from, because it is a genetic clone of that tree. Grafting/budding is a form of cloning that's been practiced for hundreds, if not thousands of years.

I don't know where you're located, but $186.00 is a phenomenal rip-off for a grafted walnut. You should be able to purchase them all day long for well under $50. Check out the NNGA Marketplace page at the Northern Nut Growers Association website - www.northernutgrowers.org, and the offerings from my friends at Nolin River Nut Tree Nursery

Here is a link that might be useful: Nolin River Nut Tree Nursery

lucky_p, thank you so much for the advice and for the site.

Best wishes