OK...I don't know why these pictures are posted in the opposite order from how I added them. Please bear with this. This picture is what your Grandma's Flower Garden looks like from the back side when it is totally completed. The background fabric has been trimmed away, and the freezer paper has been removed.
Once the Grandma's Flower garden is appliqued down to the background fabric this is the view from the front. I SEE TWO OF MY HEXAGONS ARE OFF with the stripe fabric I picked...so be careful if you pick a stripe when you are sewing the hexagons together make sure the lines are still meeting. Something I did not see with my eyes alone...not until I saw this picture was it so clear to the sight.
Pin the Grandma's Flower Garden piece to the background fabric. 
It's alright to take off the freezer paper where you no longer need it. This is the view from the back.
After adding the second row of hexagons then start on the third. Always work OUTWARD when you are sewing these tiles together. When the outside row of hexagons are in place then baste down the outside seams. Leave the freezer paper in place to keep these outside lines straight.
Once the Grandma's Flower garden is appliqued down to the background fabric this is the view from the front. I SEE TWO OF MY HEXAGONS ARE OFF with the stripe fabric I picked...so be careful if you pick a stripe when you are sewing the hexagons together make sure the lines are still meeting. Something I did not see with my eyes alone...not until I saw this picture was it so clear to the sight. 
Pin the Grandma's Flower Garden piece to the background fabric. Make sure it's centered. (This is a good piece to match up the center points and push one straight pin through both and into the ironing board cover so you can rotate GFG piece around to have it the way you want it on the background fabric).
Keep the fabrics as flat as possible. Remember to work on a flat surface as you pin and applique this down.
Take out the pins as you go... before you get to them...after removing the pin then push the fabric as flat as you can before back whip stitching this into place.
When I got to a seam between hexagons I took out the pins to the next hexagon, flattened it down well, and then sewed that hexagon edge into place.
It's alright to take off the freezer paper where you no longer need it. This is the view from the back.
After adding the second row of hexagons then start on the third. Always work OUTWARD when you are sewing these tiles together. When the outside row of hexagons are in place then baste down the outside seams. Leave the freezer paper in place to keep these outside lines straight. 
