Flowers at ground level are fine. Bringing the flowers to eye level allows you to see their beauty up close and personal. Hanging baskets do that job but require sturdy installation and are only available where there is a wall, fence or branch to hang the basket from. Flower stands don't have those limitations.
Pots and Wood
Decide how tall and wide you want the three-tier flower stand to be. Terracotta pots come in all sizes and shapes. You will need two sizes. The final height of the third level will be the heights of the three pots' (including the strawberry pot) total height. Use smaller or larger sizes than suggested if you wish.
Place the first and largest pot where you want the plant stand located. Turn it right side up and fill with rocks, gravel or sand to stabilize it.
Place the first wood round circle on top of the pot. The circle should be centered over the center of the pot.
Place the second terracotta pot right side up in the middle of the circle directly over the first pot. Fill it with rocks, gravel or sand.
Place the second wood round circle on top of the second pot.
Place the strawberry pot as the third tier of the flower stand. Fill the bottom with a 3-inch layer of rocks or gravel. Fill the strawberry pot up to the first level of plant pockets. Plant those with alyssum, lobelia, bacoba or any trailing flower. Fill to the next layer of pockets and plant. Top the strawberry pot with a trailing geranium.
Place containers of flowers on the first level and second tiers of the plant stand.
Place the iron rebar where you want the plant stand. Pound it 6 inches into the ground. Make sure it is vertically straight.
Place the first terracotta pot's drainage hole over the rebar and slide it down the bar. Fill with soil to within 4 inches of the top. Water so the soil settles down.
Thread the second terracotta pot's drainage hole over the rebar and slide it down to rest on the soil of the first pot. Fill it with soil to within 4 inches of the top and water.
Take the strawberry pot and thread the rebar bar through the drainage hole and rest it on the top of the second pot.
Fill the area between the rim of the first pot and bottom of the second pot with plants. Fill the area between the rim of the second pot and the bottom of the strawberry jar with plants. Plant the strawberry pot with plants.