The mechanics used when arranging permanent flowers are similar to those for fresh flowers. However, precautions against flowers wilting are unnecessary. A dry foam made especially for permanent flowers is used to support the stems. Two types of dry foam for permanent flowers are available. One is used for delicately stemmed flowers and the other for larger, sturdy stems. Styro foam may also be used. Styro foam is strong and will hold heavy or large stems but is difficult to use with delicate stems. Delicately stemmed flowers are usually placed on a wooden or steel pick before being inserted into the styro foam.
Dry foam can be wedged into containers without additional support. In containers where wedging the dry foam is impossible, the foam may be attached to the container with a floral adhesive, such as hot glue. Anchor pins glued to the container may also be used to secure it.
The dry foam or styro foam will need to be hidden by covering it with sheet moss or Spanish moss. This will prevent the foam from being visible between the flowers. Use greening pins to hold the moss in place. Flower stems can be easily inserted through the moss.
The stems of silk or dried flowers may be glued in place as the design is constructed. This will prevent the stems of heavy flowers from turning and also prevent the stems from slipping out of ice foam. Dipping stem ends in pan glue before inserting them is probably the easiest method.