Draw a circular shape on a piece of graph paper. Jot down the measurement for the width of the circle of the garden bed. Each square on the grid will represent a portion of that measurement. Draw the pattern that you have chosen onto the circular shape. This will help you to decide how many plants you need and how far apart they will be planted.
Measure the width of the circular flower garden space in the area where it is to be planted. Insert a stick into the area where the center will be. Tie a cord to the stick and mark the circle by walking around the stick while shaking out a line of flour.
Dig up the soil with a spade. Remove any stones from the area. Set the stick back into the center of the circular flower bed. Stretch the cord out to the circle edge to use for a guide.
Following the pattern guide on your graph paper, start at the middle of the circular garden and dig a small hole for the first plant with a garden trowel or the spade. Choose one of the taller plants or a rosebush for the center planting and set it into the hole.
Pull the cord out in a straight, taut line to keep rows of plants even. Dig the holes according to the design around the circular bed for each plant or seedling.