I have bent them in loops and they grow. Now one thing FAN leafs are not FAN leafs , Not SHADE leaf. They are solar feeding cell for the plant. They convert sunlight/etc, with the ferts, water,etc to make BUD. With out them you have a stick.
Use chlose pins to weigh them down.
Now next time plan ahead to the blooming cycle.
they will grow x amout till they get in to the full blooming part of the blooming(?) cycle . This is dependant on the strain.
One strain I had had 11X 18 in leafs/shade/fan/ etc. The buds weighted about one OZ to 3-4 inches.
Note if fan leaves were not needed the plant would not make them.
Plan ahead for the next crop, and you will be supprized.