What is the collective noun for weeds?

There isn't a single, universally accepted collective noun for weeds. However, here are some options you could use, depending on the context:

Informal:

* A patch of weeds

* A clump of weeds

* A tangle of weeds

* A mass of weeds

* A growth of weeds

More poetic:

* A wilderness of weeds

* A profusion of weeds

* A riot of weeds

* A scourge of weeds

Ultimately, the best choice depends on the specific situation and the desired effect.