The character can converse, in very rudimentary terms, with all sorts of plants and plantlike creatures (including fungi, molds, and plantlike monsters such as shambling mounds). The character automatically exercises limited control over normal plants. Plantlike creatures can negate the control effect with a Will save.
The spell does not enable plants to uproot themselves and move about, but it does allow them to move their branches, stems, and leaves. Thus, the character can question plants as to whether or not creatures have passed through them, cause thickets to part to enable easy passage, require vines to entangle pursuers, and command similar services.
The plants can duplicate the effect of an entangle spell or free creatures trapped by that spell.