Let’s learn more about hydrangeas! Trivia quiz and fun facts about hydrangeas for kids
Hydrangeas are flowers that bloom in the rainy season and change color.
Here, we introduce fun trivia quizzes and knowledge questions about hydrangeas for kids.
Hydrangeas can turn blue or pink depending on the soil’s components, and there are many varieties with different shapes.
They also have meanings in the language of flowers and are known as blooms that express kindness.
You can learn various aspects of history through hydrangeas, so we encourage both children and adults to give it a try together.
If this sparks your interest in hydrangeas, we hope you’ll look into them even more!
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Let’s learn more about hydrangeas! Fun facts quiz and trivia questions about hydrangeas for kids (1–10)
When is the season when hydrangeas bloom beautifully?
- spring
- summer
- rainy season (tsuyu)
See the answer
rainy season (tsuyu)
In Japan, hydrangeas mainly bloom beautifully during the rainy season. In June, when there is a lot of rain, the hydrangeas that bloom quietly and gracefully are truly lovely.
The origin of the name “hydrangea” comes from combining two words—but what are those two words?
- Atsu and Ai
- Purple and the Sun
- Rain and Blue
See the answer
Atsu and Ai
The origin of the word “ajisai” (hydrangea) is said to come from the way many blue flowers gather together: combining “atsumari” (gathering) and “ai-iro” (indigo/blue) to form “ajisai.” In other words, 集 (gather) + 藍 (indigo) = あじさい. There are also various other theories.
What in the soil causes the color of hydrangea flowers to change?
- moisture
- temperature
- sourness
See the answer
sourness
The color of hydrangea flowers changes depending on how acidic the soil is. This is called acidity. Strong acidity makes them blue, while strong alkalinity makes them pink.
Learn More About Hydrangeas! Trivia Quiz & Fun Facts for Kids About Hydrangeas (Questions 11–20)
Which confectionery has the name “Hydrangea”?
- dango
- jelly
- yokan (sweet red bean jelly)
See the answer
jelly
“Hydrangea jelly” is a type of Japanese confectionery that represents hydrangea flowers using colorful jelly. Its beautiful appearance makes it a popular sweet during the rainy season.
Where is the building named after hydrangeas located?
- Hydrangea Nursery School
- Hydrangea Library
- Hydrangea Station
See the answer
Hydrangea Station
Ajisai Station is the name of a station on the Iga Railway in Mie Prefecture. It is also sometimes used as a building name, such as Ajisai Hall. It can be fun to look into the different uses!
Why is hydrangea written with the kanji 紫陽花?
- Because the color of the flower is purple
- Because it blooms under the sunlight
- Because a flower’s name was mistakenly attached in a Chinese book
See the answer
Because a flower’s name was mistakenly attached in a Chinese book
It’s because the kanji “紫陽花,” which had been used for a different flower in ancient Chinese texts, came to be used for hydrangeas in Japan. It was originally the name of another flower, but by mistake it became the name for hydrangeas.
Why do hydrangeas bloom at the beginning of summer?
- Because there is a lot of rain in the summer, it grows easily.
- Because it's a flower that blooms in winter
- Because they are flowers for Obon
See the answer
Because there is a lot of rain in the summer, it grows easily.
Hydrangeas bloom vibrantly in early summer, when it becomes warm and there’s plenty of rain during the damp rainy season. Hydrangeas are flowers that love rain and warmth.


