Is it illegal to plant flowers and fruit trees in the green belt of the community?

If you plant flowers and fruit trees in the green belt of the community. If it is a property, they are planted in a unified way. It's not illegal. Let's look at the flowers and collect some fruits. However, if it is privately planted, it is illegal for him not to ask the consent of the property owner. You can't help it if the property wants to cut him down.