There are some cultures who believe bonsai plants bring bad luck.

Traditional beliefs and superstitions concerning bonsai plants are the source of the belief that they bring bad luck. It's worth noting that these ideas might differ substantially among cultures and people.

A few reasons why bonsai plants may be considered unlucky in certain cultures are:

Some cultures may see bonsai trees negatively due to their diminutive size, which is thought to indicate stunted growth or limited riches. For some, the little tree represents freedom from shackles or limitations.

Because of their long history of participation in funeral rites, bonsai trees may have a negative connotation in some societies. Because of this link, some people think that bonsais bring bad luck or negative energy into their homes.

It is claimed that the positioning of particular plants can impact the flow of energy (chi) in Feng Shui, the art of organizing the environment to improve positive energy flow. 

One such factor that affects how bonsai are perceived is cultural taboos and beliefs regarding particular trees or plants. Some cultures may hold certain trees in high regard, and the little bonsai versions of these trees may be seen negatively because of this.

Taking into account your cultural background, personal views, and tastes is crucial if you are interested in bonsai trees and want to have them in your home. 

Different cultures have different and ever-changing ideas, and people's understanding of symbols can also differ greatly. Seek out information from trustworthy cultural sources or talk to people who are knowledgeable with the cultural context if you have questions or concerns about cultural attitudes about particular plants.

Keep coming back here for the most up-to-date information.