In der Gärtnerei sagt die Verkäuferin, ein frischer Strauß halte länger in kaltem Wasser.

It means At the garden center / nursery / florist’s shop.

A Gärtnerei is a place connected with plants and flowers. Depending on context, it can be:

• a nursery
• a garden center
• sometimes a florist’s business

In this sentence, because it talks about a Strauß (bouquet), an English speaker would probably understand it as something like at the florist’s or in the flower shop.

Because this is about location, not movement.

The preposition in can take:

• dative for location: in der Gärtnerei = in/at the nursery
• accusative for movement toward something: in die Gärtnerei = into the nursery

Here, the sentence means the woman is speaking there, so German uses the dative:

• in der Gärtnerei

Because Gärtnerei is a feminine noun: die Gärtnerei.

After in with a location meaning, German uses the dative, and the dative form of die is der:

• nominative: die Gärtnerei
• dative: in der Gärtnerei

So:

• die Gärtnerei = the nursery
• in der Gärtnerei = in the nursery

German often puts a time/place expression first for emphasis or style.

The key rule is that the finite verb must still stay in second position in a main clause. So if In der Gärtnerei comes first, the verb comes next:

• In der Gärtnerei | sagt | die Verkäuferin

This is normal German word order.

You could also say:

• Die Verkäuferin sagt in der Gärtnerei, ...

But the original version sounds more natural if the speaker wants to set the scene first: At the florist’s, the saleswoman says...

It means the saleswoman or female shop assistant.

It comes from:

• verkaufen = to sell
• der Verkäufer = salesman / male sales assistant
• die Verkäuferin = saleswoman / female sales assistant

The ending -in often marks a feminine job title in German.

Because a new clause starts there.

The sentence has:

1. the main clause: In der Gärtnerei sagt die Verkäuferin
2. a reported statement: ein frischer Strauß halte länger in kaltem Wasser

German normally uses a comma to separate clauses like this.

Because this is indirect speech and uses Konjunktiv I.

Compare:

• Direkte Aussage:
  Ein frischer Strauß hält länger in kaltem Wasser.
  = A fresh bouquet lasts longer in cold water.

• Indirekte Rede:
  Die Verkäuferin sagt, ein frischer Strauß halte länger in kaltem Wasser.
  = The saleswoman says that a fresh bouquet lasts longer in cold water.

The form halte is the Konjunktiv I form of halten for er/sie/es.

German often uses Konjunktiv I after verbs like:

• sagen = say
• meinen = mean / think
• berichten = report
• erklären = explain

It shows that the sentence is being reported, not directly asserted by the narrator.

Yes, in everyday German many speakers would say:

• Die Verkäuferin sagt, ein frischer Strauß hält länger in kaltem Wasser.

That is very common in speech.

But halte is more clearly marked as reported speech, and it is especially common in:

• formal writing
• journalism
• careful standard German

So:

• halte = more explicitly indirect speech
• hält = very common in everyday usage

German can report speech in two common ways:

1. with dass

   • Die Verkäuferin sagt, dass ein frischer Strauß länger in kaltem Wasser hält.

2. without dass, often using Konjunktiv I

   • Die Verkäuferin sagt, ein frischer Strauß halte länger in kaltem Wasser.

Both are correct.

The version without dass can sound a bit more formal or report-like, especially with Konjunktiv I.

Here it means a fresh bouquet.

Be careful: Strauß can mean two different things:

• bouquet
• ostrich

In this sentence, because of kaltem Wasser, it clearly means bouquet.

Also:

• ein = a
• frischer = fresh
• Strauß = bouquet

Because Strauß is masculine: der Strauß.

Here it is the subject of the clause, so it is in the nominative singular:

• ein frischer Strauß

After ein in masculine nominative singular, the adjective takes -er:

• ein frischer Strauß
• ein guter Wein
• ein alter Baum

It means longer.

It is the comparative form of lang (long), but here it is being used adverbially:

• lange = for a long time
• länger = longer

So:

• Ein frischer Strauß hält länger. = A fresh bouquet lasts longer.

In natural English, länger here is often best translated as:

• lasts longer rather than literally holds longer

Because halten has several meanings in German, and one of them is to last or to keep.

Common meanings of halten include:

• to hold
• to stop
• to keep
• to last

In the context of flowers:

• Der Strauß hält lange. = The bouquet lasts a long time.

So in this sentence:

• halte länger = would last longer / lasts longer

Because in here again expresses location/condition, so it takes the dative.

The bouquet lasts longer in cold water.

• Wasser is neuter: das Wasser
• dative singular: in kaltem Wasser

So the phrase means:

• in cold water

Because Wasser is:

• neuter
• singular
• in the dative
• and there is no article before it

When there is no article, the adjective carries the case ending itself. For neuter singular dative, that ending is -em:

• in kaltem Wasser

Compare:

• in dem kalten Wasser = in the cold water
• in kaltem Wasser = in cold water

So:

• with article: kalten
• without article: kaltem

No, here Wasser is being used as an uncountable substance noun, like water in English.

That is why there is no article:

• in kaltem Wasser = in cold water

If German wanted to refer to specific water, it could say:

• in dem kalten Wasser = in the cold water

But here it means water in general.

The subject is ein frischer Strauß.

So the structure is:

• ein frischer Strauß = subject
• halte = verb
• länger = adverb/comparative
• in kaltem Wasser = prepositional phrase

Even though halte may look unfamiliar, it still agrees with ein frischer Strauß in the third-person singular.

A direct-speech version could be:

• Die Verkäuferin sagt: „Ein frischer Strauß hält länger in kaltem Wasser.“

Or more naturally:

• Die Verkäuferin sagt: „Ein frischer Strauß hält in kaltem Wasser länger.“

In direct speech, German usually uses the normal indicative form:

• hält

In indirect speech, it becomes:

• halte

No. German word order is flexible, especially with adverbials.

You could also hear:

• ... ein frischer Strauß halte in kaltem Wasser länger.

That may sound a little more natural to some speakers because länger is closely connected to halte.

Both are possible, but the original sentence is correct.

A rough English guide:

• Gärtnerei ≈ GAIRT-neh-rye
• Verkäuferin ≈ fer-KOI-fuh-rin
• Strauß ≈ shtrowss

A few important points:

• ä often sounds somewhat like the vowel in air
• äu sounds like oy
• ß is pronounced like s
• str at the beginning of a syllable is usually pronounced shtr

So Strauß sounds more like shtrowss than strauss in English spelling terms.

A natural translation would be:

• At the florist’s, the saleswoman says that a fresh bouquet lasts longer in cold water.

You could also say:

• At the flower shop, the saleswoman says a fresh bouquet lasts longer in cold water.
• At the nursery, the saleswoman says a fresh bouquet will last longer in cold water.

If you want to reflect the indirect-speech flavor of halte, you might translate it as:

• ... says that a fresh bouquet lasts longer in cold water.

English usually does not mark this distinction as clearly as German does here.