The Form::textarea() method works similar to the Form::input() method except that it allows for a fourth parameter to determine if existing HTML entities are encoded or not, the default is to convert everything.
echo Form::textarea('name');
<textarea name="name"></textarea>
Add the second parameter to declare a value
echo Form::textarea('name', 'This is my body');
<textarea name="name">This is my body</textarea>
The third parameter accepts an array of attributes
echo Form::textarea('name', 'This is my body', array('disabled'=>FALSE));
<textarea name="name" disabled="1">This is my body</textarea>
If the body of your textarea includes existing HTML entities then set the fourth parameter to FALSE to avoid double encoding.
// & will be double encoded
echo Form::textarea('name', 'You & Me', NULL, TRUE);
<textarea name="name">You &amp; Me</textarea>
// & will NOT be double encoded
echo Form::textarea('name', 'You & Me', NULL, FALSE);
<textarea name="name">You & Me</textarea>