Is it illegal to plant trees privately in public green space?

Legal analysis: it depends on the specific situation. First, private individuals are absolutely not allowed to plant trees in public areas unless discussed and approved by the owners' meeting; Second, property management companies have no right to change the use of public areas without authorization, unless discussed and approved by the owners' meeting.

Legal basis: Article 274 of the Civil Law of People's Republic of China (PRC), the roads within the building division are owned by the owners, except those belonging to urban roads. The green space within the building division belongs to the owner, except for urban public green space or express personal green space. Other public places, public facilities and property services within the building division are owned by the owner.

"Regulations on Property Management" Article 49 The public buildings and facilities built according to the plan within the property management area shall not be changed. If the owners need to change the use of public buildings and facilities according to law, they shall inform the property service enterprises after handling the relevant formalities according to law; If the realty service enterprise really needs to change the use of public buildings and facilities, it shall be submitted to the owners' meeting for discussion and approval, and the owners shall go through the relevant formalities according to law.