Hétfő óta az ültetőládában van a petrezselyem.

to be

Breakdown of Hétfő óta az ültetőládában van a petrezselyem.

• az: the
• hétfő: the Monday
• óta: since

Questions & Answers about Hétfő óta az ültetőládában van a petrezselyem.

What does óta mean here, and how is it used?

Óta means since in time expressions.

So:

• hétfő óta = since Monday

It is used after a point in time and shows that something started then and has continued up to now.

Examples:

• reggel óta = since morning
• tavaly óta = since last year
• kettő óta = since two o’clock

In this sentence, it tells us that the parsley has been in the planter box continuously since Monday.

Why is it Hétfő óta and not hétfőn?

Because the meanings are different:

• hétfőn = on Monday
• hétfő óta = since Monday

So:

• Hétfőn az ültetőládában van a petrezselyem.
  = On Monday the parsley is in the planter box.

• Hétfő óta az ültetőládában van a petrezselyem.
  = The parsley has been in the planter box since Monday.

The sentence you have is about duration from Monday until now, not just one day.

What does ültetőládában mean, and how is it built?