Breakdown of Prepara esas hierbas y tendrás un remedio muy útil.
y
and
tener
to have
un
a, an (masculine)
muy
very
Questions & Answers about Prepara esas hierbas y tendrás un remedio muy útil.
Why are we using a command (prepara) and the word y instead of just starting with si (if)?
This is a common colloquial way to express a condition. Using an imperative followed by y and the future tense (Prepara esas hierbas y tendrás...) means the exact same thing as Si preparas esas hierbas, tendrás... (If you prepare those herbs, you will have...). It sounds punchier and more conversational, just like saying 'Do this and you will get that' in English.
Is prepara here the imperative command or just the present tense él/ella form?
It is the informal tú command. You can tell because the second half of the sentence uses tendrás, which is the tú form of the future tense. The entire sentence is directed at a person you address as tú.
I sometimes see yerba written instead of hierba. Are they the same thing?
Why does útil have a written accent mark?