What flowers should not be mixed together?

Some flowers simply don't get along, either because of scent, ethylene gas, or different care needs. For example, daffodils and hyacinths release a gas that makes other flowers wilt faster, so keep them in their own arrangement or condition them separately for 24 hours before adding them. Strongly scented blooms like lilies, tuberoses, and hyacinths can overwhelm lighter flowers and even cause headaches for you and your guests. Also, avoid mixing flowers with very different water needs, such as delicate ranunculus with hardy sunflowers, as one will suffer. Some flowers, like bluebells and daffodils, have sap that is harmful to other stems. If you love a mix, ask your florist to treat stems properly or use separate vessels. Finally, consider colour harmony: clashing bright reds with hot pinks can look chaotic rather than intentional. Stick to a clear palette and let your florist guide you on which blooms naturally complement each other in both care and looks.