It's ridiculous how much these plants have grown in such short time; proper amounts of fertilizer are an amazing thing. Strange to think they were still so small just a couple weeks ago.
The comparison is striking. They're on a lot of fertilizer, but I'm still being very careful and measured in the amounts I'm dispensing. As the plants move toward the desired height before flowering (I don't think it'll be too long at this rate), I'll gradually re-balance levels over a couple weeks to be more conducive to flower growth.
It does seem like I'm going to need to get some sticks to prop the branches up once they start flowering as they will likely end up too heavy to self-support. This echoes advice given in at least one of the guides I've read on mainlining.
Here are some comparison shots for each of the individual plants, at the same time interval as the above comparison: