A plant's aroma is one of the key aspects of gardening, since the smells of flowers and herbs can trigger strong emotions. Azara microphylla, Chinese Fringe Tree Chionanthus retusus, Citrus All varieties, Fragrant Snowbell Styrax obassia, Japanese Apricot Prunus mume, Loquat Eriobotrya japonica are some of the fragrant plants.