Flowered stepping stones without color, such as simple indentations or outlines of flowers, will not compete with the hues of the flowers in your garden. If you do use stepping stones with colored flower designs, take care that they don't clash with the overall aesthetic of your garden. For example, if you are creating the look of a traditional English garden, avoid stepping stones decorated with exotic, tropical flowers.
Use flower-imprinted stepping stones as a themed "guide" to the flowering sections of your garden. Lay out square stones out in a checkerboard pattern or use stones of different sizes and shapes to create a whimsical look. The portability of stepping stones makes it easy to rearrange them whenever you want to change the look or layout of your garden.
Give your stepping stones a less traditional purpose. Pile them up to create a border around flowerbeds with the flower design on the top layer to complement the natural blooms or place them in a shallow pond in lieu of a small bridge, with the flowers evoking the image of pond lilies.
Making decorated stepping stones is a relatively simple process. You can buy plain stepping stones and then add a cap of decorated mortar on the top of each stone or buy concrete mix and a stone mold to make a set entirely from scratch. Either way is much cheaper than buying pre-made and pre-decorated stepping stones, though this process requires a significant investment of time.
Concrete stains are one way to add color to your stepping stone flower designs. You can also use small tiles, broken pottery or colored glass to create flower mosaics. Make sure to bury all sharp edges in the stone.