J’attends pour rempoter tant que la plante est saine.

Because je becomes j’ before a vowel sound. This is called elision.

So:

• je attends → j’attends

French does this to make pronunciation smoother. You’ll see the same thing in:

• j’aime
• j’habite
• j’écoute

Rempoter means to repot a plant, or to put it into a new pot.

It is a regular -er verb, so it follows normal -er patterns:

• je rempote
• tu rempotes
• il/elle rempote

In this sentence, it appears in the infinitive form: rempoter.

Because it comes after pour.

In French, after a preposition like pour, you normally use the infinitive:

• pour manger = to eat / in order to eat
• pour partir = to leave / in order to leave
• pour rempoter = to repot / in order to repot

So pour rempoter is grammatically normal as a structure.

It is understandable, but many native speakers would find it a little less natural than other options.

If the idea is I’m holding off on repotting, French often prefers:

• J’attends avant de rempoter.
• J’attends avant de la rempoter.

That said, attendre pour + infinitive can still be understood, especially as wait before doing something or wait in order to do something later.

So the sentence is not impossible, but a more idiomatic version might be:

• Tant que la plante est saine, j’attends avant de la rempoter.

Tant que means as long as or while.

In this sentence, tant que la plante est saine means that the waiting continues during the time when the plant is healthy.

So the logic is:

• as long as the plant is healthy, I wait
• once that condition is no longer true, the situation may change

This is different from a simple one-time event. It describes an ongoing condition.

This is a very common question.

• tant que = as long as / while
• jusqu’à ce que = until

So:

• Tant que la plante est saine... = As long as the plant is healthy...
• Jusqu’à ce que la plante soit saine... = Until the plant is healthy...

They are not interchangeable.

Also, jusqu’à ce que is normally followed by the subjunctive, while tant que usually takes the indicative.

Because tant que normally takes the indicative when you are talking about a real situation or condition.

Here, the speaker is stating a condition viewed as factual:

• la plante est saine = the plant is healthy

So est is the normal choice.

You would expect soit after something like jusqu’à ce que, not usually after tant que:

• jusqu’à ce que la plante soit saine

Because saine agrees with la plante, which is feminine singular.

The adjective is:

• sain for masculine singular
• saine for feminine singular

Examples:

• un homme sain
• une plante saine

French adjectives usually agree in gender and number with the noun they describe.

Good question. French can leave the object understood when it is clear from context.

Here, la plante has already been mentioned, so rempoter can be understood as repot it / the plant.

But if you want to make it more explicit, you could say:

• J’attends avant de rempoter la plante.
• J’attends avant de la rempoter.

In fact, de la rempoter often sounds smoother and more natural in connected speech.

Yes. French is flexible here, and many speakers would naturally put the tant que clause first:

• Tant que la plante est saine, j’attends avant de la rempoter.

This order can make the logic clearer:

1. condition first: as long as the plant is healthy
2. main action second: I wait before repotting it

So the original sentence is understandable, but this reordered version often sounds more natural and easier to process.