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fadetoblack1

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Nov 20, 2012

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May 24, 2013

#1

or can other problems cause it?

 

Seamaiden

Living dead girl

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May 24, 2013

#2

Overwatering can also be a cause. Being too hot can look very similar.

 

alpinehi

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Feb 23, 2013

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May 26, 2013

#3

Leaf curling/twisting is a general sign of stress. It could be a 100 different things. Checking the humidity and the things Sea mentioned is a good place to start.