Dáme kompost do půdy a zasadíme sazenice.

Czech often leaves out subject pronouns because the verb ending already tells you who is doing the action.

• dáme = we will put / we put
• zasadíme = we will plant / we plant

So my is not necessary. If you did say my, it would sound more emphatic, like we specifically.

These are perfective verbs:

• dát = to put, give, place, as a completed action
• zasadit = to plant, as a completed action

In Czech, the present-tense forms of perfective verbs usually refer to the future. So:

• dáme = we will put
• zasadíme = we will plant

This is very common in Czech. English usually needs will, but Czech often does not.

Grammatically, it is a future statement: we will put compost into the soil and plant seedlings.

But in practice, Czech often uses this kind of first-person plural form in instructions, recipes, and guides. So it can sound like a step-by-step instructional style, similar to English Now we add..., Next we plant...

If you want a true let’s command, Czech would normally use the imperative:

• Dejme kompost do půdy a zasaďme sazenice.

So the original sentence is not the direct imperative form, but it can still sound instructional.

Czech does not have articles like English the and a.

So:

• kompost can mean compost, the compost, or some compost
• půdy can be understood as soil / the soil
• sazenice can mean seedlings / the seedlings

The exact meaning is usually clear from context. If Czech speakers want to be more specific, they use other words, not articles.

Because kompost is the direct object of dáme, so it is in the accusative case.

The noun kompost is masculine inanimate, and for many masculine inanimate nouns, the accusative singular looks the same as the nominative singular.

So:

• nominative: kompost
• accusative: kompost

That is why the form does not change.

Because do means into, and it requires the genitive case.

The base form is:

• půda = soil

After do, it becomes:

• do půdy = into the soil

This is also a motion idea:

• do půdy = into the soil
• v půdě = in the soil

So do půdy is used because something is being put into it.

Because it is the object of zasadíme, so it should be in the accusative.

For this noun:

• nominative singular: sazenice
• accusative singular: sazenici
• nominative plural: sazenice
• accusative plural: sazenice

So in this sentence, sazenice is accusative plural, which is why it means seedlings.

This is a common source of confusion, because the form sazenice can look like singular or plural depending on context.

It actually follows regular Czech grammar for this noun type, but the form happens to stay the same in some cases.

In the plural:

• nominative plural: sazenice
• accusative plural: sazenice

So the direct object plural looks the same as the dictionary-like plural form. That is why it may seem unchanged.

This is the difference between perfective and imperfective verbs.

• dát = to put/give once, as a completed action

• dávat = to be putting, to put repeatedly, habitually, or as a process

• zasadit = to plant, as a completed action
• sázet = to be planting, to plant repeatedly or habitually

The sentence uses perfective verbs because it describes clear, completed steps:

• first we put the compost in
• then we plant the seedlings

If you wanted a habitual meaning, you would use imperfective forms, for example:

• Na jaře dáváme kompost do půdy a sázíme sazenice. = In spring, we put compost into the soil and plant seedlings.

Because a here simply joins two coordinated actions:

• Dáme kompost do půdy
• zasadíme sazenice

In normal Czech spelling, you usually do not put a comma before a simple a when it just means and between coordinated parts.

So the sentence is correctly written without a comma.

No, Czech word order is fairly flexible because case endings show the grammatical roles.

The original sentence is natural and straightforward:

• Dáme kompost do půdy a zasadíme sazenice.

But you could also move things around for emphasis, for example:

• Kompost dáme do půdy a sazenice zasadíme.

That version emphasizes compost and seedlings more strongly. So in Czech, word order often changes the focus or style, not the basic meaning.