Aus kleinen Samen werden später oft starke Pflanzen, wenn die Erde feucht bleibt.

Because German often puts a phrase other than the subject in the first position for emphasis or style. Here, Aus kleinen Samen highlights the starting point: from small seeds.

There is also a very common German pattern:

Aus X werden Y = X turns into / grows into Y or Y comes from X

So Aus kleinen Samen werden ... Pflanzen means that strong plants develop out of small seeds.

Because aus always takes the dative case.

So:

• aus kleinen Samen
• not aus kleine Samen

In the dative plural, the adjective usually ends in -en, which is why you get kleinen.

The noun Samen is plural here. In many dative plural forms, the noun also adds -n, but Samen already ends in -en, so there is no extra visible change.

Here aus means from / out of in the sense of origin or source.

It is not about physical movement like walking out of a room. Instead, it shows what something develops from:

• Aus kleinen Samen werden Pflanzen.
• From small seeds, plants grow / become plants.

So it is about transformation or development from one state into another.

No. Here werden is not the future auxiliary. It is the full verb to become.

So in this sentence:

• werden = become
• not will

German uses the present tense very often for general truths, habits, and natural processes. So werden here means that small seeds later become strong plants.

In German main clauses, the finite verb must be in second position.

Here, the first position is taken by Aus kleinen Samen. That means the verb werden has to come next:

• Aus kleinen Samen | werden | später oft starke Pflanzen

So the subject appears after the verb.

This is normal German word order. The subject is starke Pflanzen, and the verb agrees with it in the plural: werden.

A more basic order would be:

• Starke Pflanzen werden später oft aus kleinen Samen.

But that version sounds less natural here. The original sentence is much better.

Because German often leaves out the article when speaking about things in general.

Here the sentence is making a general statement about nature, not talking about specific plants. So:

• starke Pflanzen = strong plants in a general sense
• not the strong plants

Without an article, the adjective takes a stronger ending, which is why you see starke.

Because starke Pflanzen is the subject, and it is in the nominative plural.

With no article in the nominative plural, the adjective ending is usually -e:

• starke Pflanzen

Compare that with the dative phrase earlier:

• aus kleinen Samen

So the different endings show different grammatical roles:

• kleinen = dative plural after aus
• starke = nominative plural subject

• später = later
• oft = often

So the sentence says that this happens later and often.

They are both adverbs:

• später gives a time idea
• oft gives a frequency idea

The order sounds natural in German. It means something like:

• later, often
• or more smoothly in English: often later become

Wenn can mean both if and when, depending on context.

In this sentence, it introduces a general condition:

• wenn die Erde feucht bleibt

That can be understood as:

• if the soil stays moist
• or when the soil stays moist

In a sentence about general natural processes, English often prefers if or when depending on style, but the German wenn works well for this kind of repeated or typical condition.

Because wenn introduces a subordinate clause, and in German subordinate clauses, the finite verb normally goes to the end.

So:

• wenn die Erde feucht bleibt

This is standard German word order after conjunctions like:

• wenn = if/when
• weil = because
• dass = that

That is also why there is a comma before the wenn-clause.

Because bleibt means stays or remains, which emphasizes continuation.

• die Erde feucht ist = the soil is moist
• die Erde feucht bleibt = the soil stays moist / remains moist

The sentence is talking about a condition that needs to continue over time for the plants to develop well, so bleibt is the better choice.

Not here. In this context, die Erde means soil, earth, or ground.

German Erde can mean:

• Earth as the planet
• earth/soil in gardening or nature contexts

Because the sentence is about seeds and plants, the meaning is clearly soil.

Usually feucht is better here.

• feucht = moist, damp
• nass = wet, soaked

For plants, feucht sounds natural because moist soil is usually the desired condition. Nass can suggest too much water.

So:

• die Erde feucht bleibt = the soil stays moist

is the most natural choice in this sentence.