Start by inflating two of your 5-inch petal balloons and tie together.
Inflate a third balloon and tie it into the pair of balloons, creating a 3-balloon grouping.
Create another pairing, and then one final group with the center petal and the sixth petal. So you'll have one group of 3 balloons, one pair that's the same color or that you're using as petals, and one pair that includes your center and a back piece.
Start twisting your balloons together, creating a cluster. Twist one of the pairs of balloons with the center piece (that's a different color).
Then twist the last pair around the center piece, creating your flower shape.
From the back you'll see the same color as the rest of the petals. Adjust the center part of the flower so it's centered.
Once you have your balloon daisy you can use size 19 rubber bands, balloon glue or the long skinny balloons to tie it into your arch.