Badass Tough Plants You Know Of

Privet.

Spreads by suckers and seed. Evergreen. Incredibly dense thickets. Will grow thirty feet in sun but even full shade won't stop it. Will pop out of any soil. Can coppice/pollard it several times a year.

Excellent year round goat forage. Chickens like the berries (a rare winter food source). Pretty white flowers.

Produces decent poles and firewood.