Japanese flower arrangement, also known as Ikebana, focus on the line of the twigs and leaves, rather than on the flowers themselves like in Western designs. The line of the twigs or leaves is combined with a small number of blooms and the design is complemented by the style of the container which is also a key element in the Ikebana style.
Next, fill your "real" vase about two_thirds of the way with warm water. Make sure it doesn't leak. Add flower food if available. (Follow the instructions on the packet.) Place a few of your larger blossom flowers in the vase and step back. This will give you a better idea of how to proportion your bouquet. If the stems are too long, simply cut them shorter. If they are too short, try a different container, or add pebbles or marbles to the bottom of the vase to elevate your flowers.