I'm sorry to ask such a basic question, but can anyone explain this usage:
"Grow a business."
...as opposed to "expand" a business.  
There clearly is the intransitive/transitive difference between grow and
expand; but since one can (in the transitive sense) "grow tulips," why can't
one (correctly) "grow a business"?  Is it the simple insertion of "a" that
makes the difference?  What's happening there?
Sorry again to ask such fundamental grammatical questions.

- Jean Harper