Al mattino faccio colazione in giardino.

Al mattino is a very common Italian way to mean in the morning.

• al = a + il
• mattino = morning

Even though a + il often literally means to the, in time expressions it can have a broader meaning. So al mattino is best understood as in the morning, not translated word-for-word.

Italian often uses:

• al mattino = in the morning
• alla sera = in the evening
• al pomeriggio = in the afternoon

Here al is the contraction of a + il.

In this sentence, it introduces a time expression. It does not mean to the morning in natural English. Instead, it functions more idiomatically, giving the sense of during / in the morning.

This is one of those cases where the literal pieces are less important than learning the whole expression:

• al mattino = in the morning

Italian usually expresses this idea with the idiom fare colazione, literally to do/make breakfast, but really meaning to have breakfast or to eat breakfast.

So:

• faccio colazione = I have breakfast

This is just the standard Italian expression. English sometimes has a single verb, to breakfast, but Italian normally does not use a single everyday verb in the same way here.

Other similar Italian expressions are:

• fare pranzo = to have lunch
• fare cena = to have dinner

In the expression fare colazione, Italian normally does not use an article.

So the standard phrase is:

• fare colazione = to have breakfast

Not:

• fare la colazione in normal everyday usage

This is because fare colazione works as a fixed idiomatic expression. English does something similar when it says have breakfast, not usually have the breakfast.

Literally, faccio comes from fare, which often means to do or to make. But in many expressions, fare combines with a noun and the whole phrase has a special meaning.

So here:

• faccio colazione does not mean I make breakfast
• it means I have breakfast

That is why it is better to learn fare colazione as one unit.

In giardino usually means in the garden in a general sense, or out in the garden as the location where the action happens.

Italian often omits the article in certain location expressions, especially when the place is being treated more as a setting than as a specifically identified object.

• in giardino = in the garden / out in the garden
• nel giardino = in the garden, but often with a more specific or definite feel, like in the particular garden

So both can be possible in some contexts, but in giardino sounds very natural for a general routine statement like this one.

Yes. All of these can be used, though the nuance can vary a little.

Common options:

• al mattino = in the morning
• la mattina = in the morning / in the mornings
• di mattina = in the morning, often with a habitual feel

For example:

• Al mattino faccio colazione in giardino.
• La mattina faccio colazione in giardino.
• Di mattina faccio colazione in giardino.

All are natural. Al mattino is a very standard, slightly formal-neutral way to say it.

Italian often leaves out subject pronouns when they are not needed, because the verb ending already shows who the subject is.

Here:

• faccio = I do / I make / I have

So faccio already tells you the subject is io. That is why io is normally omitted.

You could say:

• Io al mattino faccio colazione in giardino

But that usually adds emphasis, contrast, or clarity:

• Io faccio colazione in giardino, tu in cucina.

No, Italian word order is fairly flexible, although some orders sound more natural in neutral speech.

The original sentence:

• Al mattino faccio colazione in giardino.

This is very natural. But you could also say:

• Faccio colazione in giardino al mattino.
• In giardino faccio colazione al mattino.

The meaning stays very similar, but the emphasis changes:

• Al mattino at the beginning highlights the time
• In giardino at the beginning highlights the place

So the original version is a good neutral sentence, especially if you want to begin with in the morning.

They are closely related, but not always interchangeable in every expression.

• mattino is common in expressions like al mattino
• mattina is common in expressions like stamattina and di mattina

Examples:

• al mattino = in the morning
• di mattina = in the morning
• stamattina = this morning

In many contexts they are very close in meaning, but it is best to learn the most common fixed combinations rather than trying to swap them freely every time.

Giardino is pronounced approximately like jar-DEE-no.

A few useful points:

• gi before a gives a soft sound, like the j in jar
• the stress is on -di-: giar-DI-no
• the r in Italian is usually tapped or lightly rolled

So:

• giardino ≈ jar-DEE-no

It does not sound like a hard g as in garden.