Learn Farsi: از بازار سبزی می‌خرم.

In Farsi, the subject pronoun is often dropped because the verb ending already tells you who is doing the action. The -م at the end of می‌خرم clearly means "I buy", making من unnecessary unless you want to emphasize that you (and not someone else) are doing the buying.

Why doesn't the word for greens (سبزی) have the direct object marker را (râ) after it?

The word را is only used for definite or specific direct objects (like "the greens" or "those greens"). Because the speaker is just talking about buying greens in general—not a specific, previously mentioned bunch—را is left out.

Does سبزی just mean vegetables in general?

Not quite! While it comes from the word for "green", سبزی usually refers specifically to fresh leafy herbs (like basil, mint, and tarragon) that are very popular in Iranian cuisine. If you want to say "vegetables" in general (like carrots, potatoes, and onions), you would normally use the plural form سبزیجات.

Could می‌خرم also mean "I am buying" right now?

Yes! Farsi uses this same verb form (the present indicative, built with the می- prefix) for both habitual actions ("I buy greens every week") and continuous actions ("I am buying greens right now"). You have to rely on context to know which meaning is intended.