6 weeks old. it's like when the first cotyldons died off. it's like that. all the bottom ones are turning brown. dried out. and then falling off. while the top branches are lush green.
How many nodes total are still lush vs. Damages one below if just bottom 2-3 are damaged and you have about 5-9 nodes oka
then I reccomend lighting the bottom with cfl's and check ph level and how big are the pots u got vs how big the plant?