木曜日は、マリーのはてな日記/Marie the Scientist
/How can I make cut flowers last longer?」
How can I make cut flowers last longer?
Today was Dad’s birthday.
I was planning to give him roses because he likes flowers.
But Mom said,
Why don’t you give him something else, Marie?
Cut flowers won’t last long in summer.”
Isn’t there something I can do?”
To find out Mom and I went to a flower shop.
“Hello, may I ask you something?
How can I make cut flowers last longer?”
First, you have to change the water every day.”
“I do that.”
“And where do you put the flowers?”
“In the corner of the living room.”
“Does that place get a lot of sunlight?”
“Well, not really.”
“Then I don’t think that is a good place for flowers.
“Because plants are alive.
Just like humans.
They breathe and they eat food to live.”
“Ah, with sunlight, plants take in CO2 and produce Oxygen.
I learned that at school.”
And when they make oxygen they also make something called starch.”
“What is starch?”
“It’s like food for plants.
It gives them energy.
If plants can’t make starch, they die.”
So my flowers will live longer If I put them in sunlight?”
“It helps but cut flowers are weak.
Their roots and many leaves are taken away, so their power to produce starch is much lower.”
They can’t make enough food.”
“There is one way to give them energy, though.”
“What is it?”
It’s a strong energy source.
If plants can’t make enough energy themselves, you can add sugar to their water so they can take in energy through their stems.”
“When I’m tired I want to drink something sweet like juice.
It’s the same.”
“Yes, in my experience, about one teaspoon of sugar for every 100 milliliters of water works well.
Some flowers like a little more or less.”
“I’ll try it.”
“But be careful, sweet water can become bad quickly.
So be sure to change the water every day.”
“And also flowers don’t like hot places.
So put them in a cool place.
A room with an air conditioner is good.”
“I hope your flowers will last longer now.”
“Mom, let’s buy roses.
I know how to enjoy them longer.”
So I came home and put roses in water with sugar.
When my Dad saw the roses he said,
“Marie, thank you.
They smell so good.
But why is there a sugar pot right next to the flower vase?”
“That’s a secret.”