You want to stay within flowers that are considered non-toxic to humans. Some toxic flowers include: Lily of the Valley, Foxglove, Daffodils, Oleander, Desert Rose, Wolfsbane, Hydrangea, Larkspur, Pointsettia, and Baby’s Breath (but wild baby’s breath a.k.a. Woodruff is a-okay!). Just be sure to do a quick Google search before choosing any non-edible flowers for decorating.