Ми сіємо насіння в теплиці.

Сіємо is the 1st person plural present tense form of сіяти.

• сіяти = to sow, to plant
• сіємо = we sow / we are sowing

The ending -ємо tells you the subject is we. That is why ми is optional in many contexts.

It is pronounced roughly SEE-ye-mo.

You can think of it as three parts:

• сі
• є
• мо

The є here gives a ye sound. So the whole word is approximately SEE-ye-mo, with the stress on the first syllable.

The infinitive is сіяти.

This verb is imperfective, which means it is used for:

• ongoing actions
• repeated actions
• general processes

So сіємо can mean:

• we are sowing
• we sow
• we do sow

A common perfective partner is посіяти, which means to sow in the sense of completing the action.

Yes, you can often leave ми out.

Ukrainian verbs usually show the subject clearly through their endings, and сіємо already means we sow. So both are possible:

• Ми сіємо насіння в теплиці.
• Сіємо насіння в теплиці.

Including ми can add clarity, emphasis, or contrast.

Насіння is the direct object, so it is in the accusative case. But for this noun, the accusative form looks the same as the nominative form.

So:

• nominative: насіння
• accusative: насіння

That is normal here. The case is determined by the sentence structure, even when the form does not visibly change.

Grammatically, насіння is usually treated as a singular neuter noun, even though in English it may refer to seed or seeds.

It often works like a collective or mass noun:

• насіння = seed / seeds / seed material, depending on context

So in Ukrainian, you often use singular agreement with it.

Because after в meaning in, when you are talking about location, Ukrainian uses the locative case.

The base form is:

• теплиця = greenhouse

In the locative singular it becomes:

• в теплиці = in the greenhouse

So the ending changes from -я to -і.

Then you would use a different case.

• в теплиці = in the greenhouse → location
• в теплицю = into the greenhouse → movement toward/into

So Ukrainian distinguishes between:

• where something happens → locative
• where something goes → accusative

In this sentence, sowing happens inside the greenhouse, so в теплиці is correct.

Yes. Ukrainian word order is fairly flexible, because case endings carry a lot of grammatical information.

The neutral order here is:

• Ми сіємо насіння в теплиці.

But you could also hear:

• У теплиці ми сіємо насіння.
• Насіння ми сіємо в теплиці.

These versions are not random; they shift the emphasis:

• У теплиці first = emphasis on the place
• Насіння first = emphasis on what is being sown

Often, yes. Ukrainian alternates between в and у for ease of pronunciation and smoother sound.

So both may be possible in many contexts:

• в теплиці
• у теплиці

Speakers choose the one that sounds better with the surrounding words. In this sentence, в теплиці sounds natural, but у теплиці would also be acceptable in many situations.