The triangle shape is one of the basic shapes in flower arranging. This shape was especially popular in the 1960s and now suggests a classic, nostalgic look. Start with some base flowers or foliage to determine the size of your triangle. After that you can place your flowers in the arrangement, being sure to keep balance by placing heavier looking flowers at the bottom. Foliage is good for the bottom of the triangle because it can be positioned to the side.
Place floral foam into a vase, making sure it is secure.
Arrange small flowers with long stems and leaves with long stems on a flat surface to determine the shape of the arrangement. Arrange one long flower with a long stem in the middle and arrange foliage out to the sides to form a triangle.
Secure the small flowers and foliage to the foam in a triangular arrangement, forming a pattern for the whole arrangement.
Position large flowers in the centre of the arrangement toward the base of the triangle. Large flowers should be low on the arrangement for the proper balance.
Add the rest of the flowers and leaves, keeping the triangular shape. Use smaller flowers at the top of the arrangement.