My old college professor gave me a bunch of exotic seeds a few weeks ago, one species being S. giganteum.
It germinated in about 2 weeks and seemed to be doing well. I keep it in an indoor greenhouse, humidity is ~40-60%, temp is between 76-82. I keep it under a fluorescent light ~1200 lumens w/an 8.5in reflector.
This morning, I woke up to the 4 little prongs curled and black at the tips. I water very sparingly and have a small fan for air circulation.
I've included a pic from yesterday and one from this morning. Any advice would be greatly appreciated :]