Over the past few decades, researchers worldwide have been motivated to explore alternative renewable bio-based materials for colouring purposes, aiming to minimize the negative environmental impact associated with the use of synthetic dyes. Natural dyes extracted from flower crops have gained increasing attention in recent years due to their potential as a sustainable alternative to synthetic dyes, which have negative environmental impacts. A variety of exquisite shades, ranging from delicate pastels to vibrant and striking tones, can be derived by extracting pigments found in numerous flowers. Unlike synthetic dyes, natural dyes are renewable, biodegradable, and non-toxic. Moreover, natural colourants offer diverse practical finishing characteristics, such as insect repellent, deodorizing, anti-feedant, antimicrobial, fluorescence, and UV protection properties. This review provides an overview of the recent advances in the extraction and application of natural dyes from flower crops along with the classification of natural dyes. The review is mainly focused on the different ornamental plant sources of natural dyes, various flowers used for extraction of dyes and the application of natural dyes in the industries like textile, cosmetic and food industries. The review also discusses different challenges and opportunities in the development of natural dyes from flower crops.