Cut fresh lemons into 1-inch thick slices and discard the end portions; the amount of lemon slices that you need will depend on the vase size.
Fill a circular or square vase with water and the lemon slices.
Choose fresh flowers to use in the centerpiece. Pick flowers that match the lemon slices, such as yellow daisies or roses, for a cohesive look. Use blooms featuring bright, contrasting colors, such as pink peonies or purple hydrangeas, for added vibrancy. Cut the flower stems at a mix of 1 and 2 inches higher than the depth of the vase for a varied appearance. Insert the flowers into the vase. Place the taller stems in the middle and the shorter ones around the sides or mix the flowers up for variety.
Surround the centerpiece with small glass candle holders filled with yellow citrus-scented candles to give the table ambiance and a fresh fragrance.