What material is commonly used to support stems in floral arrangements?

Floral foam is commonly used to support stems in floral arrangements because it effectively holds the stems in place and provides stability for the overall design. It is a porous material that absorbs water, which helps maintain the freshness of the flowers by providing them with hydration. This is especially important in arrangements where the flowers are expected to last for several days or longer. The ability of floral foam to hold stems securely also allows for greater creativity in arranging, as florists can create various shapes and styles without worrying that the flowers will shift or fall out of place. It is particularly beneficial for more complex designs or for supporting flowers with heavy blooms.

Other materials mentioned serve different purposes in floral design. Wicker baskets and glass vases are used primarily for holding arrangements but do not provide the same level of support and stability as floral foam. Wire mesh can be used in some arrangements to support stems; however, it is less common and typically requires more skill to use effectively, as it doesn't offer the same water-retention properties as floral foam.