Wash all of your fruits and vegetables beforehand. Pro tip: Wash your produce with equal parts distilled white vinegar & filtered water to remove any potential bacteria & pesticides.
Start by placing the stemmed grapes, then crackers and work your way inwards to fill in any gaps.
Use edible flowers, or tell your guests whether or not the flowers are edible.
Try to separate any colors you feel are too similar to one another, mix it up!