更简洁地说: The first one I bought was a blueberry plant.

NOTE: You can safely delete the phrase "I bought."
注意:您可以安全地删除短语"I bought."。

I was更平滑: When strolling on my phone and, I accidentally noticed that the flowers of blueberries flowers are cute and beautiful.

COMMENT: Here in Shizuoka City, Japan my wife and I also have a blueberry plant. It blossoms in March and the blueberries ripen in August.

When my blueberry was delivered to me, i也有可能: At first, my blueberry plant had a few fruits and some flowers on the tops of the branches --only a few flowers.

that'OPTION A: How I came to own that plant is a long story.¶
OPTION A: How that plant became mine is a long story.

I will tell it alonOPTION A: Perhaps I will tell that story someday.¶
OPTION B: Perhaps I'll share that tale someday.

After planting this blueberry plant, I found it was fun to plant fruit because you could enjoy both theits flowers and the fruit.

COMMENT: Indeed. In our garden in Shizuoka, we have blackberries too. I will trying kiwi plants. (Strawberries are possible, but insects love to eat strawberries!)

Then I bought some strawberry plants.

I'm very happy when I get up every day andtoo see my fruits become bigger and bigger.

The first one I bought was a blueberry {plant | bush}.

We normally call them “bushes,” but “plant” is OK.

I was stcrolling on my phone and accidentallyhappened to noticed that {the flowers of blueberries | blueberry flowers} are cute and beautiful.

When my blueberry was delivered to me, it had {a few berries | some fruits} and some flowers on / at the tops of the branches --

In my version of English, we only use “a few fruits” when we mean “a few kinds of fruit,” but others might use it differently—I don’t know.

I will tell it alone someday.separately someday. | I will tell it some other time.

Suggestion: But that’s a story for another day.

In your original sentence, “alone” would describe you: you would tell the story by yourself, without assistance from other people.

I'm very happy when I get up every day and see my fruits {becomeing | getting} bigger and bigger.

“Become” is not idiomatic to me in this sentence. “Becoming” sounds better, but “getting” is most natural.