Plants that bestow benediction
It was discovered recently that even plants exhibit feelings and emotions. We generally grow pet animals like dogs , bullocks etc. We get some utility from them. Dogs exhibit gratitude and faithfulness. Cows and Bullocks are also animals of utility. Hence we pet them.
Similarly some plants like Tulasi, Vilva, Neem, Peepal etc. also have the ability to bestow benediction on the people who nourish them. This was discovered by our Maharshis. Hence we grow and nourish these plants to get us the benediction.