Based on the information provided, it is stated that Lord Shiva does not like red flowers. It is also mentioned that specific flowers such as Datura, Mandara, and Shami are the ones that are offered to him. Therefore, it can be inferred that any flower other than Datura, Mandara, and Shami can be considered as a flower that Mahadev doesn’t like. However, without further information, it cannot be determined specifically which flower Mahadev doesn’t like.
Read a related post: Which tree lives for 100 years in India?