2. Trace pattern onto typing or tracing paper. Place the pattern over the oasis and cut out the heart shape. (Note: If oasis is not big enough, two pieces may be glued together.) Put water in the pie tin and soak the oasis in water for about 1/2 hour. Cut off heads of roses and place into the oasis, filling in space as tightly as possible.
3. After the entire oasis is filled with flower heads, turn the heart on its side and pin lemon leaves around the sides, overlapping as needed. Continue until the oasis is entirely covered.
4. Place the floral heart on a glass or china plate or in a shallow bowl.