This discourages bacteria from forming due to decaying foliage in the vase water. You need to add the right amount of floral preservative to the vase water. DON'T combine flowers which do not naturally blend well. Consider the morphology, texture, as well as the color. For example, bold, angular, shiny tropical flowers such as bird of paradise do not blend well with softer, delicate, ruffled flowers such as sweet peas.
Balance is achieved when a design gives a feeling of stability.
This is accomplished by establishing a pattern with flowers in the bouquet. Remove foliage that will fall below your thumb while making the bouquet. Gather 3 to 5 stems of flowers in your hand. Do not lay the stems on top of each or let them cross, instead, lay them next to each other. Add additional flowers using this same method.