I've had this Boston fern for a while, it has always been sickly and with few fronds, but following the sage advice of people from gardenweb, I managed to resurrect it, a few new growths sprouted from the dirt after a change of location and a repotting. But these growths have begun to droop and turn dark green. I am worried that whatever is causing the new growths to droop may kill the plant. What should I do?

whole plant