Domenica porto un mazzo di fiori a mia nonna.

In Italian, days of the week often appear without a preposition when they mean on a certain day.

So:

• Domenica porto un mazzo di fiori a mia nonna. = On Sunday, I’m bringing / I bring a bouquet of flowers to my grandmother.

A useful contrast:

• domenica = on Sunday / this Sunday
• la domenica = on Sundays / every Sunday

So in this sentence, Domenica refers to a specific Sunday, not a habitual action.

Italian very often uses the present tense to talk about the near future, especially when the time is already clear from context.

Here, Domenica tells you when the action happens, so porto can naturally mean:

• I bring
• I’m bringing
• I will bring

All are possible translations depending on context.

This is very common in Italian:

• Domani parto. = I’m leaving tomorrow.
• Stasera vedo Luca. = I’m seeing Luca tonight.

So porto is grammatically present, but its meaning here is future.

Because porto is the first-person singular form of the verb portare (to bring / to carry).

Conjugation in the present tense:

• io porto = I bring
• tu porti = you bring
• lui/lei porta = he/she brings
• noi portiamo = we bring
• voi portate = you all bring
• loro portano = they bring

So the sentence uses porto because the subject is understood to be io (I), even though Italian usually leaves subject pronouns out when they are not needed.

Un mazzo di fiori literally means a bunch/bundle of flowers, and in normal English it is often translated as a bouquet of flowers.

Breakdown:

• un = a
• mazzo = bunch / bouquet / bundle
• di = of
• fiori = flowers

So literally:

• un mazzo di fiori = a bunch of flowers

This is a very common expression in Italian.

Because Italian uses di to link a container/group/quantity word to what it contains.

So:

• un mazzo di fiori = a bouquet of flowers
• un bicchiere di vino = a glass of wine
• un gruppo di amici = a group of friends

Here, mazzo is the “grouping” noun, and fiori tells you what the bouquet consists of.

Because mia nonna is the recipient of the action, and Italian uses a before the person who receives something with verbs like dare (to give), portare (to bring), mandare (to send), and so on.

So:

• porto un mazzo di fiori a mia nonna = I bring a bouquet of flowers to my grandmother

This works like an indirect object:

• Do un regalo a Marco. = I give Marco a gift.
• Mando una lettera a mia zia. = I send my aunt a letter.

Usually, a mia nonna is the normal choice here because it marks the recipient: the person you are bringing the flowers to.

• porto un mazzo di fiori a mia nonna = I bring a bouquet of flowers to my grandmother

Per mia nonna can sometimes mean for my grandmother, but it sounds different. It emphasizes that something is intended for her, not necessarily that she is the direct recipient in the action.

Compare:

• Questo regalo è per mia nonna. = This gift is for my grandmother.
• Porto questo regalo a mia nonna. = I’m bringing this gift to my grandmother.

So in your sentence, a is the more natural and standard choice.

This is a very important rule in Italian.

With singular family members, Italian normally uses the possessive without the article:

• mia madre = my mother
• mio padre = my father
• mia nonna = my grandmother
• mio fratello = my brother

So a mia nonna is correct.

However, the article usually appears:

1. with plural family members

   • i miei genitori = my parents
   • le mie sorelle = my sisters

2. when the family noun is modified

   • la mia cara nonna = my dear grandmother

So the lack of an article in mia nonna is not random; it follows a standard rule.

Because mia nonna does not take an article here.

If there is no article, then you just use a:

• a mia nonna

If there were an article, then a + la would become alla:

• alla nonna = to the grandmother
• alla mia cara nonna = to my dear grandmother

But since mia nonna is a singular family member with a possessive, Italian normally drops the article, so alla mia nonna would not be the standard form here.

It is understood from the verb porto.

Italian usually does not need subject pronouns like io when the verb ending already shows who the subject is.

• porto already means I bring
• so io is optional

You could say:

• Io porto un mazzo di fiori a mia nonna.

But this would usually add emphasis, such as:

• I’m the one bringing flowers to my grandmother

Without emphasis, Italian normally prefers:

• Porto un mazzo di fiori a mia nonna.

Italian word order is fairly flexible, and putting Domenica first gives the time expression a natural prominence.

So:

• Domenica porto un mazzo di fiori a mia nonna.

means something like:

• On Sunday, I’m bringing a bouquet of flowers to my grandmother.

This order is very natural when you want to set the time first.

You could also hear other orders, depending on emphasis, for example:

• Porto un mazzo di fiori a mia nonna domenica.

But the original version is very common and sounds smooth.

Normally, no.

In Italian, words like nonna, madre, padre, and days of the week such as domenica are usually not capitalized unless they begin the sentence.

So:

• Domenica is capitalized here because it is the first word of the sentence.
• nonna stays lowercase.

This is different from English, where days of the week are always capitalized.