Hi,
The flytrap which more trap have fertilizer.
So fertilizer effect in root make the root grow more than the not fertilizer ( experiment with nepenthes the plant with the leaf smaller don't have enough root ) and the plant was fertilizer root grow more. I will take a picture of the root
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lol I spent time to watch picture of CPs for how they grow only a few thing in picture can make me find some thing new.