How do you refer to a single corn plant? [closed]

When you want to talk about a single corn plant, do you refer to it at as 'a corn' or 'corn'?

A single corn plant is usually referred to as a cornstalk. This refers to the stem of the plant itself, and would be applicable even if the plant is too young to have actually borne any corn yet. Corn is typically used as an uncountable noun, referring to large quantity of grain crop. You can't make it singular or plural, since it refers to a mass of objects. If you want to refer to individual members of a field of corn, you'll need to use more specific, countable nouns like corn cob, ear of corn, cornstalk, or corn kernel.