Preparamos el plantel en la mesa de cultivo.

Preparamos can mean either:

• we prepare / we are preparing (present)
• we prepared (preterite, simple past)

For -ar verbs, the nosotros form is the same in those two tenses. So the sentence by itself is ambiguous; the wider context tells you which meaning is intended.

Spanish often leaves out subject pronouns when the verb already shows who is doing the action.
Here, preparamos already tells you the subject is we.

So:

• Preparamos el plantel... = normal, natural Spanish
• Nosotros preparamos el plantel... = possible, but adds emphasis or contrast

In this sentence, plantel is being used in an agricultural or horticultural sense. It refers to young plants, seedlings, or nursery stock being prepared for cultivation or transplanting.

This is important because plantel can mean other things in other contexts, such as:

• a team or squad
• a staff
• in some regions, a school campus

So the context of mesa de cultivo makes the gardening/agriculture meaning clear.

Spanish often uses the definite article where English might not.

Here, el plantel suggests a specific set or batch of seedlings/young plants, not just the general idea of seedlings. In other words, it is the plant stock / the seedlings relevant to this situation.

Also, nouns in Spanish usually need an article unless there is a reason to omit it.

Because plantel can work like a collective noun. Even though it may refer to multiple young plants, Spanish treats it as one unit.

So it is similar to saying:

• the plant stock
• the batch of seedlings

That is why singular el plantel is natural.

It is a very common Spanish structure:

• mesa = table
• de cultivo = of cultivation / for growing

So mesa de cultivo is literally cultivation table, but more naturally in English it would be something like:

• growing table
• cultivation table
• growing bench

The phrase de cultivo acts like a descriptive label telling you what kind of table it is.

Spanish very often uses noun + de + noun to classify or describe something.

So:

• mesa de cultivo = cultivation/growing table
• centro de salud = health centre
• mesa de comedor = dining table

Using para would change the feel of the phrase and sound less like a standard fixed name. De is the normal choice for naming the type of object.

Both can be possible, but they are not exactly the same.

• en la mesa de cultivo focuses on the location: on/at the growing table
• sobre la mesa de cultivo emphasizes physical position: on top of the growing table

With work surfaces, Spanish often uses en where English might use on. So en la mesa is very natural.

No, Spanish word order is flexible. The basic neutral order here is:

• Preparamos el plantel en la mesa de cultivo.

But you could also say:

• En la mesa de cultivo preparamos el plantel.

That version puts more emphasis on the location. The meaning stays basically the same.

Not exactly. Cultivo is a noun, not an adjective. But the whole phrase de cultivo works adjectivally because it describes mesa.

So grammatically it is a prepositional phrase, but functionally it tells you what kind of table it is.

Usually, preparar means to prepare something. In this sentence it has a direct object:

• el plantel

So the sense is we prepare the seedlings / plant stock.

If you wanted we get ready, Spanish would more commonly use a reflexive verb:

• nos preparamos = we get ready / we prepare ourselves

It fits Spain Spanish well, especially in a technical or agricultural context. But vocabulary in this area can vary a lot across the Spanish-speaking world.

Depending on the country, people might instead use words such as:

• plántulas
• semillero
• almácigo

So the sentence is valid, but some regions might prefer a different horticultural term than plantel.