There is no universally recognized flower that specifically means “I hate you.” In fact, many flowers have positive meanings associated with them, such as love, friendship, and gratitude. However, some flowers may be associated with negative or hostile emotions, and could be used to convey a negative message if given in a certain context.

One flower that has been associated with negative emotions in some cultures is the yellow rose. While yellow roses are typically associated with friendship and joy, they have also been used to convey jealousy, infidelity, and other negative emotions in some contexts. In some cultures, yellow roses have even been used as a symbol of deceit and betrayal.
Another flower that has been associated with negative emotions is the black rose. While black roses do not occur naturally, they have been created through dyeing or genetic engineering. In some contexts, black roses have been used to represent death, mourning, and the end of a relationship. However, because they are not a natural flower, they are not commonly associated with any particular meaning.
In general, it is important to consider the cultural and personal associations of a flower when giving it as a gift. Flowers are often used to convey positive emotions and sentiments, such as love, appreciation, and congratulations. However, they can also be used to convey negative emotions, such as anger, resentment, and disappointment. If you are looking to convey a negative message with flowers, it is important to consider the context of the relationship and to be clear about your intentions.
Ultimately, the meaning of a flower is determined by the context in which it is given and received. While there are some flowers that have negative connotations in certain cultures or contexts, there is no universally recognized flower that means “I hate you.” Instead, it is important to communicate your emotions clearly and directly in any relationship, regardless of whether or not you choose to use flowers to convey your message.