Scented plants can be either a delight or a curse. For many people, there is nothing more pleasing than a garden filled with fragrance, but for others who suffer allergies, certain plants can make them physically ill; sometimes very seriously. Some scented plants (e.g., Lavender and Eucalyptus) are unlikely to be a problem to any of your neighbours or friends. Others including Jasmine, Gardenia and Citrus; while a delight to many people, are common problems for others.