How-to Use a Grid to Arrange Flowers
Here's how to arrange your long-stemmed roses like a pro. Place strips of waterproof floral tape parallel to one another across the top of the vase. Then place strips perpendicular to the first set to form a grid. Wrap a piece of tape to secure ends around the rim of the vase.
Fill the vase with water. Insert flowers, placing taller ones near the center and shorter ones near the rim to create a rounded form. Fill in with greens and baby's breath, making sure to cover the tape on the rim of the vase.