How do you spell hebe in greek letters?

There isn't a single Greek word "hebe" that directly translates to the English word "hebe". The spelling depends on *what* "hebe" you mean.

* If you mean Hebe, the Greek goddess of youth: Her name is written in Greek as Ήβη (Hēbē).

* If you mean the genus of plants (Hebe): This is a Latin name and therefore doesn't have a direct equivalent in Greek letters. You would simply use the Latin name, transliterated into Greek characters if needed. There's no standard way to do this, but you might see something like Ήμπη (Hēmpē) as a rough approximation.

So, the answer depends entirely on the context of the word "hebe".