You imbue inanimate plants with Mobility and a semblance of life. Each animated plant then immediately attacks whomever or whatever you initially designate as though it were an Animated Object of the appropriate size category. You may animate one Large or smaller plant, or a number of larger plants as follows: a Huge plant counts as two Large or smaller plants, a Gargantuan plant as four, and a Colossal plant as eight. You can change the designated target or targets as a move Action, as if directing an active spell.

Use the statistics for animated objects, except that plants smaller than Large don't have hardness.

Animate Plants cannot affect plant creatures, nor does it affect nonliving vegetable material.

Entangle: Alternatively, you may imbue all plants within range with a degree of Mobility, which allows them to entwine around creatures in the area. This spell causes tall grass, weeds, and other plants to wrap around creatures in the area of effect or those that enter the area. Creatures that fail their save gain the entangled condition. Creatures that make their save can move as normal, but those that remain in the area must save again at the end of your turn. Creatures that move into the area must save immediately. Those that fail must end their Movement and gain the entangled condition. Entangled creatures can attempt to break free as a move Action, making a Strength or Escape Artist check. The DC for this check is equal to the DC of the spell. The entire area of effect is considered difficult terrain while the effect lasts.

If the plants in the area are covered in thorns, those in the area take 1 point of Damage each time they fail a save against the Entangle or fail a check made to break free. Other effects, depending on the local plants, might be possible at GM discretion. Spell Resistance does not keep creatures from being entangled. This effect lasts 1 hour per Caster Level.