I Wield the Power of Flower Language and Dominate with ‘Adversity’ is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Confronted by the “Weed,” a mysterious entity infested with plants, the protagonist Yu finds himself in dire straits against its overwhelming power. In this moment of absolute crisis, Yu awakens to an unknown ability that transforms him into a Weed. This is a world where the language of flowers becomes supernatural powers. With the ultimate ability that blooms in “adversity,” he’ll mow down every enemy!!