Plaster miodu jest w ramce pszczelarskiej.

Here plaster is a false friend for English speakers.

In Polish, plaster can mean:

• a bandage / adhesive plaster
• a slice
• in this kind of context, a section of comb

So in Plaster miodu, it does not mean wall plaster. In a beekeeping sentence, it refers to a piece/section of honeycomb.

Because miodu is the genitive singular form of miód.

Polish often uses the genitive after a noun to show:

• what something is made of
• what it contains
• what kind of piece/amount it is

So:

• miód = honey (dictionary form, nominative)
• miodu = of honey / honey in a dependent phrase

That is why you get:

• plaster miodu = literally a section/slice of honey

This is similar to patterns like:

• szklanka wody = a glass of water
• kawałek chleba = a piece of bread

Because the preposition w means in, and when it describes location, Polish usually requires the locative case.

So:

• ramka → ramce
• pszczelarska → pszczelarskiej

The adjective must agree with the noun in:

• gender
• number
• case

So the whole phrase changes together:

• ramka pszczelarska = beekeeping frame
• w ramce pszczelarskiej = in a/the beekeeping frame

Plaster is in the nominative singular, because it is the subject of the sentence.

The basic structure is:

• Plaster miodu = the subject
• jest = is
• w ramce pszczelarskiej = location

So grammatically, plaster is the thing that is somewhere.

You are right that in Polish, adjectives often come before the noun:

• w pszczelarskiej ramce

That version is also correct.

But adjectives can also come after the noun, especially when the phrase sounds:

• more classifying
• more technical
• more formal
• like naming a specific type of object

So:

• w pszczelarskiej ramce = more ordinary descriptive order
• w ramce pszczelarskiej = can sound more technical or label-like

Both are understandable and correct.

Polish sometimes omits to be, but not in all situations.

In a normal full sentence like this, jest is perfectly natural:

• Plaster miodu jest w ramce pszczelarskiej.

If you remove it, the result can sound more like:

• a note
• a caption
• a headline
• an elliptical statement

So jest is the safest and most neutral full-sentence version.

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

The given sentence is a neutral order:

• Plaster miodu jest w ramce pszczelarskiej.

You could also say:

• W ramce pszczelarskiej jest plaster miodu.

That version puts more attention on the location first, something like In the beekeeping frame, there is a honeycomb section.

So the meaning stays very similar, but the focus changes.

Polish has no articles, so there is no direct equivalent of English a/an or the.

That means this sentence can be interpreted as:

• A honeycomb is in a beekeeping frame
• The honeycomb is in the beekeeping frame
• or another context-based variant

How definite it is depends on:

• context
• emphasis
• what has already been mentioned

So English must choose a or the, but Polish usually leaves that information unstated unless something else in the sentence makes it clear.