Large bouquet of flowers1. You can not put in one vase: roses with carnations, and tulips with daffodils. Both those and others in one vessel will not live long. Lilies of the valley, lilies, daffodils, carnations, primrose and sweet peas give off poisonous juice, which accelerates the wilting of other flowers. Therefore, the best place for them is in mono .2. Flowers containing milky juice (latex), will stand much longer if the ends of the stems are burned before the candle or lighter, and then immediately put in cold water. This refers to the amaryllis, dahlia, pion, hydrangea, and others. A branch of geranium serves as a natural preservative. Inconspicuously include it in the bouquet - and it will remain fresh for a long time.