eng Enviro Research Publishers Current Agriculture Research Journal 2347-4688 2321-9971 2021-12-30 9 3 149 160 10874 article M.A.M. Nirmani Kularathne S. Srikrishnah * S. Sutharsan Department of Crop Science, Eastern University, Vantharumoolai, Sri Lanka. Seaweed extracts have been used in organic agriculture to encourage the development and strengthen the quality performance of floricultural crops. The effectiveness of the seaweed extract is built entirely on hormone levels of plants or otherwise micro nutrients in the crude extract (primarily cytokines). A review of the use of seaweed on ornamental plants is carried out in the most modern research. Concerning their growth and flowering possibilities, the effectiveness of algae in ornamental plants has been validated. The purpose of this systematic review was to illustrate progress throughout the treatment of seaweeds for growth regulators to summarize the organic compounds of seaweeds as well as to investigate the challenges that encourage the application of macroalgae to manipulate various biotic and abiotic stress of crops. Seaweeds are still completely unaffected internationally; we emphasize several of the subsequent preferences for research and innovation. This whole review aims to facilitate the reader’s attention to utilize various seaweeds to increase the features and yield of ornamental crops. http://www.agriculturejournal.org/volume9number3/effect-of-seaweed-extracts-on-ornamental-plants-article-review/ Growth Regulators; Ornamentals; Seaweed; Vegetative Features; Yield Parameters