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Caraca!

Li no 420 Magazine que é planta saudável com crescimento rápido! 

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It's a bit easier to see with a bigger image. As I said earlier, this form of upward curling is a sign of very rapid growth on a healthy plant. It is obvious the plant is relishing the nutrients you are currently giving - this is a sign that less is more. If you kept adding ferts or dickered around, the leaf rims would show yellowing, which is the indicator of fert burn.
You are lucky to have a plant so healthy. Don't fret ok.

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