Lumut hijau tumbuh di lantai dekat keran luar.

In Indonesian, adjectives usually come after the noun they describe.

• lumut hijau = green moss
• literally: moss green

This is the normal word order in Indonesian:

• rumah besar = big house
• air dingin = cold water
• buku baru = new book

So lumut hijau is the expected way to say green moss.

Lumut means moss. In this sentence, it is being used as a general mass noun, much like English moss.

Indonesian nouns usually do not change form for singular or plural, so lumut can mean:

• moss
• some moss
• moss in general

If you really need to show plurality, Indonesian often uses context or reduplication, but with something like moss, that is usually unnecessary.

Tumbuh means to grow.

In this sentence, it describes what the moss does:

• Lumut hijau tumbuh... = Green moss grows...

It can be used for plants, hair, nails, and even abstract things depending on context:

• Bunga tumbuh = Flowers grow
• Rambut tumbuh = Hair grows
• Ekonomi tumbuh = The economy grows

Indonesian often does not need a verb like is/are in the same way English does.

But in this sentence, there actually is already a main verb: tumbuh (grows). So there is no need for is.

Compare:

• Lumut hijau tumbuh di lantai. = Green moss grows on the floor.
• Lumut itu hijau. = The moss is green.

In the second example, Indonesian still usually does not need a separate word for is.

Di here is a preposition meaning in, on, at, depending on context.

In this sentence:

• di lantai = on the floor

So di is marking location.

A very important point:
di as a preposition is written separately from the following word:

• di lantai = on the floor
• di rumah = at home

But di- as a passive prefix is written attached:

• dibuka = opened
• ditulis = written

This is a very common thing learners need to watch out for.

Indonesian di is broader than any single English preposition. It often covers meanings that English splits into in, on, and at.

So:

• di lantai = on the floor
• di rumah = at home / in the house
• di meja = on the table
• di Jakarta = in Jakarta

You choose the best English translation from context. Indonesian itself does not force that distinction as much as English does.

Dekat means near or close.

In:

• di lantai dekat keran luar

it tells you where on the floor the moss grows: on the floor near the outdoor faucet/tap.

You can think of dekat keran luar as describing the location more precisely.

Examples:

• dekat sekolah = near the school
• dekat pintu = near the door

In Indonesian, dekat can directly be followed by a noun:

• dekat rumah = near the house
• dekat jalan = near the road
• dekat keran luar = near the outdoor faucet

In some contexts, you may also see dekat dengan, especially when emphasizing closeness or in more formal styles:

• dekat dengan sekolah

But in everyday usage, just dekat + noun is very common and natural.

Keran means tap or faucet, and luar means outside/outdoor/exterior.

So:

• keran luar = outdoor tap/faucet or outside tap/faucet

Here, luar comes after the noun, just like many Indonesian modifiers do.

Depending on context, it could mean:

• a faucet located outside
• an exterior faucet

Because the modifier usually follows the noun in Indonesian.

So:

• keran luar = outdoor faucet
• literally: faucet outside/exterior

If you said luar keran, it would not sound like the normal way to express outdoor faucet.

This is similar to:

• pintu depan = front door
• bagian luar = outer part / exterior part

Indonesian generally builds noun phrases from the head noun first, then the describing word after it.

Here luar is functioning more like a modifier of keran.

So in keran luar, it means something like:

• outside faucet
• exterior faucet
• outdoor faucet

By itself, luar can also be a noun or location-related word meaning outside:

• di luar = outside

So compare:

• keran luar = outdoor faucet
• di luar = outside

The exact role of luar depends on the phrase it appears in.

Not too different. The basic structure is quite similar:

• Lumut hijau = green moss
• tumbuh = grows
• di lantai = on the floor
• dekat keran luar = near the outdoor faucet

So the full structure is basically:

subject + verb + location + more location detail

What differs most from English is mainly:

1. adjectives usually come after nouns
2. Indonesian prepositions are often broader in meaning
3. there are no articles like a, an, or the

Indonesian does not normally use articles like English a/an/the.

So:

• lumut hijau can mean green moss, the green moss, or just moss that is green
• lantai can mean floor or the floor
• keran luar can mean an outdoor faucet or the outdoor faucet

The exact meaning depends on context.

If Indonesian speakers want to make something more definite, they may use context, demonstratives like itu/ini, or other wording:

• keran luar itu = that outdoor faucet / the outdoor faucet

Yes. Indonesian verbs do not usually change form to mark tense the way English verbs do.

So tumbuh can often be translated as:

• grows
• is growing
• grew

depending on context.

Without extra time words, the sentence is fairly neutral. In many situations, English grows is a good general translation, but is growing could also fit if the context suggests an ongoing situation.

If Indonesian wants to emphasize ongoing action, it can use markers such as sedang:

• Lumut hijau sedang tumbuh... = Green moss is growing...

Yes, that is understandable, but it may shift the focus slightly.

Indonesian word order is somewhat flexible with location phrases, especially when multiple place expressions are involved. However:

• di lantai dekat keran luar sounds smooth and naturally groups the location as on the floor near the outdoor faucet
• dekat keran luar di lantai may sound a little less neat, depending on context

The original sentence is clearer because it first says the moss is on the floor, then narrows that down with near the outdoor faucet.

Usually lantai means floor. It can refer to:

• the floor surface of a room
• a story/level of a building

Examples:

• di lantai = on the floor
• lantai dua = second floor

In your sentence, because of tumbuh di lantai dekat keran luar, it clearly means the floor surface, not a building level.