عادة أسقي النبات المنزلي بإبريق السقي.

عادة here means usually or habitually.

Placing it at the beginning is very natural in Arabic when you want to set the tone of the sentence first:

• عادة أسقي النبات المنزلي... = Usually, I water the house plant...

You could also place it elsewhere in some contexts, but sentence-initial position is common and clear.

If fully vowelled, it is often written عادةً with tanwīn, because it is being used adverbially.

Because the verb itself already shows the subject.

أسقي means I water. The prefix أـ tells you the subject is I.

So Arabic does not need أنا here unless you want extra emphasis or contrast:

• أسقي النبات المنزلي = I water the house plant
• أنا أسقي النبات المنزلي = I am the one who waters the house plant / extra emphasis

This is very common in Arabic.

Yes. أسقي is the imperfect form, which in Arabic can cover meanings like:

• I water
• I am watering
• I do water

In this sentence, because of عادة, the natural meaning is habitual:

• عادة أسقي... = I usually water...

The verb comes from سقى / يسقي, which means to water or to give to drink.

Because the phrase is definite here.

• النبات = the plant
• المنزلي = the household / domestic / indoor one

In Arabic, if the noun is definite, the adjective must also be definite. So:

• النبات المنزلي = the indoor plant / the house plant
• نبات منزلي = an indoor plant / a house plant

So الـ appears on both words because المنزلي is an adjective agreeing with النبات.

Because Arabic adjectives agree with the noun they describe in definiteness.

So:

• النبات is definite
• therefore المنزلي must also be definite

This is a basic adjective agreement rule in Arabic.

Compare:

• نبات منزلي = a house plant
• النبات المنزلي = the house plant

Yes. Singular nouns in Arabic are often used naturally when talking about one item in context.

So النبات المنزلي most naturally means:

• the house plant
• or the indoor plant

If you wanted house plants in the plural, you would need a plural noun, such as:

• النباتات المنزلية = the house plants / indoor plants

So in your sentence, it is clearly singular.

The prefix بـ usually means with, by, or using.

Here it marks the instrument:

• بإبريق السقي = with a watering can / using a watering can

So it tells you what tool is being used for the action.

Because Arabic prepositions like بـ are attached directly to the following word.

So:

• بـ
  • إبريق becomes بإبريق

This is normal Arabic spelling.

Also, because إبريق begins with a hamza, the combined spelling keeps that visible.

Yes, it is an iḍāfa structure.

Literally, it is something like:

• إبريق = jug / pitcher / can
• السقي = the watering

Together:

• إبريق السقي = watering can
  literally the jug/can of watering

In an iḍāfa:

1. the first noun usually does not take الـ
2. the second noun determines whether the whole phrase is definite

So إبريق السقي is definite because السقي is definite.

Because in an iḍāfa construction, the first noun normally does not take الـ.

So Arabic says:

• إبريق السقي

not:

• الإبريق السقي

The definiteness comes from the second part, السقي.

This is one of the most important patterns in Arabic noun phrases.

Here the ل of الـ is not pronounced clearly, because س is a sun letter.

So السقي is pronounced approximately:

• as-saqy

not:

• al-saqy

This assimilation happens with all sun letters.

The sentence is:

• عادة = adverb
• أسقي = verb
• النبات المنزلي = object
• بإبريق السقي = prepositional phrase

So the overall order is roughly:

• Usually + I water + the house plant + with a watering can

This is a very normal Arabic order. Arabic word order is flexible, but this version sounds natural and straightforward.

A fully vocalized version could be:

عادةً أسقي النباتَ المنزليَّ بإبريقِ السقيِ

Here is why:

• عادةً: adverbial accusative
• النباتَ: direct object, so accusative
• المنزليَّ: adjective matching النباتَ, so also accusative
• بإبريقِ: after بـ, so genitive
• السقيِ: second term of iḍāfa, also genitive

In normal Arabic writing, these endings are usually not written, but they are still understood grammatically.