"There is no plant, bush or moss in the world which does not have an agent above, who watches it and tells it: Grow!" (Rabbi Simon)
According to one of the Midrash (requisition) book, even plants have their own sponsoring angels, who protect them and represent their destiny in higher realms.
In fact - every living entity in this world is supervised by a superior life force, in the form of an angel. Each person has two guardian angels, one on the left and one on the right side.