A few answers and suggestions. You are growing a strain that physically gets larger and takes longer to finish than say your White Crack. Apples and Oranges. Recycling Coco, not a fan of it. If you had any issue with previous grows, pH, or bugs....you just keep that train rolling. GH nutes, anything else to help flowering? Back your light off, it is burning them. Expect that plant to go 90+100 days. It is just starting to flower. You can help improve your future grows by actually feeding your plants much sooner. You use Coco. And Rapid Rooters don't have enough food, as you suggested they do. By the looks of your pictures, you overwatered from the beginning. The pictures of a 2 week old plant look like mine on day 4. Don't take this the wrong way, your plant is about where it should be due to grower errors. If you want to speed things up next grow, do it in the First 2 weeks of life, that determines how Autos actually do .