To do this from a living bouquet involving the bits indicated above, follow the steps outlined here to make your bouquet live as long as possible. Once the stems start to look like they’re no longer taking up water, remove them from the vase so they don’t develop mold. For the stems with blooms or possibility of drooping due to being top-heavy (Roses, Carnations, etc.), feel free to tie them upside down in a closet or cool, dim area so that gravity can help them remain upright while they completely dry out. Otherwise, lighter-weight pieces such as Aster, Limonium, Eucalyptus, Statice, etc. can be removed from the original bouquet, and placed directly in a new vase without water.