La albahaca crece en la jardinera.

Because albahaca is a feminine singular noun in Spanish, so it takes the feminine singular article la.

• la albahaca = the basil
• not el albahaca

This is one of the basic agreement patterns in Spanish: the article has to match the noun in gender and number.

Mostly because that is simply its grammatical gender in Spanish. Many nouns ending in -a are feminine, and albahaca follows that pattern.

So:

• la albahaca
• una albahaca

As in English, grammatical gender is something you usually just learn with the noun.

Because the subject is la albahaca, which is treated as singular.

• la albahaca = singular
• therefore crece = it grows

If the subject were plural, the verb would change:

• Las albahacas crecen en la jardinera. = The basil plants grow in the planter.

So this is just normal subject-verb agreement.

Crece is the third-person singular present tense of crecer.

Conjugation:

• yo crezco
• tú creces
• él/ella/usted crece
• nosotros crecemos
• ellos/ellas/ustedes crecen

In this sentence, crece means grows or is growing, depending on context.

Spanish often uses the simple present to state general facts, habitual actions, or things that are happening in a normal ongoing way.

So La albahaca crece en la jardinera can mean something like:

• The basil grows in the planter
• The basil is growing in the planter

Spanish does not always need a separate progressive form the way English often does.

Here, jardinera means something like a planter, flower box, or plant container.

It does not mean the whole garden. That would be jardín.

So compare:

• jardín = garden
• maceta = flowerpot / pot
• jardinera = planter / window box / long plant container

The exact English translation can vary depending on the object.

Yes. Depending on context, jardinera can also mean female gardener.

But in this sentence, because of crece en la jardinera, it clearly means a container where plants grow.

Context usually makes the meaning obvious.

En usually means in, on, or at, depending on context.

Here, en la jardinera means in the planter or sometimes in the planter box.

Spanish uses en in many location expressions where English might choose different prepositions. So it is very common and very flexible.

Because jardinera is also a feminine singular noun, so it takes la.

• la jardinera = the planter

Again, this is article-noun agreement:

• feminine singular noun → la
• masculine singular noun → el
• feminine plural noun → las
• masculine plural noun → los

Spanish often uses the definite article more often than English does, especially with general nouns or when talking about something as a category or known thing.

So la albahaca can sound natural even where English might simply say basil.

This is very common in Spanish and usually should not be translated word-for-word.

Normally, no. In standard Spanish, you would usually say La albahaca...

Leaving out the article can sound unnatural here. Spanish generally prefers an article before a noun in this kind of sentence.

So:

• natural: La albahaca crece en la jardinera.
• unnatural in most contexts: Albahaca crece en la jardinera.

Yes, but it means something different.

• La albahaca crece en la jardinera. = the basil grows in the planter
• La albahaca está en la jardinera. = the basil is in the planter

So:

• crece focuses on growth
• está focuses on location

Both are correct, but they are not interchangeable in meaning.

The most natural order here is:

• La albahaca = subject
• crece = verb
• en la jardinera = location phrase

So: La albahaca crece en la jardinera.

Spanish word order is somewhat flexible, but this standard order is the clearest and most neutral. You might move elements around for emphasis, but a learner should stick with the basic pattern first.

A Latin American pronunciation would be approximately:

• jar-di-NE-ra

A few useful points:

• j sounds like a strong h-like sound in Spanish
• the stress is on ne
• r is tapped lightly here, not fully rolled

And albahaca is approximately:

• al-ba-A-ca

with the stress on ha/a in the middle syllable.

Yes, it is natural and grammatical.

That said, in some regions people might more often say maceta if they mean a regular flowerpot, while jardinera can suggest a longer planter box or decorative container.

So the sentence is correct, but the most natural noun for the container may depend on the exact object and region.