vegging problems

Hello everyone, First time growing AutoFlowers here and I have two going, short riders from nirvana. Ones a few weeks older than the other. I had them with some flowering plants with the lights at 12 12 and they were both flowering normally. But the flowering plants finished and I replaced them...

hello all - i wonder if i could pick your brains. relatively new grower trying to start off some Think Different under a 26w Secret Jardin vegging light. All has been going well but now some of the leaves are yellowing and taking on a troubling appearance - being a newb am not sure whether they...