Denn du bist was du isst
und ihr wisst was es ist

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haha

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I should read  all of their lyrics.

They change their colors according to the acidity of the soil.
Blue hydrangeas are acid; Pink ones are alkaline.

Btw, plants grow best when the soil is weakly acid.

"They're like humans. You know as they say that a person's personality is influenced by one's surrounding environment."