I got a bunch of willow branches with catkins on them from the CT Flower Show earlier this year. I didnt know that catkins are the willow flowers in full bloom till the farmer told me. I put these branches in a container of water. And now the branches have grown roots, catkins fallen and developed into leaves. I am told each of these branches is a potential tree and can be sown in the ground after they develop roots. In a year the tree would grow to about 10 feet and bear catkins early next spring. I plan to grow them in a container (I saw a container with weeping willow at the grocery store) for a year before planting them.