Green Blockade

You raise a barrier of plant life before you.

(Masters of the Wild: A Guidebook to Barbarians, Druids, and Rangers)

Originally posted on D&D tools

Conjuration (Creation)
Level: Druid 2,
Components: V, S, DF,
Casting Time: 1 action
Range: Close (25 ft. + 5 ft./2 levels)
Effect: 20-ft.-long, 1-ft.-thick wall of vegetation
Duration: 1 round/level
Saving Throw: None
Spell Resistance: No

Any creature trying to pass through this blockade must succeed at a Strength check (DC 15) to do so; success ends its movement on the other side of the wall.

Fire burns away the blockade in 1 round, or creatures with appropriate implements can chop through it in 1 minute.