What is the collective noun for plantains?

There isn't a widely accepted collective noun specifically for plantains.

However, you could use a general collective noun like:

* A bunch of plantains

* A cluster of plantains

* A pile of plantains

You could also get creative and use something like:

* A hand of plantains (referencing the way they grow in a bunch)

* A green/ripe/fried/baked/roasted/etc. collection of plantains (depending on how they are prepared)

Ultimately, the best choice depends on the context and your personal preference.