Lettuce grow

[stuartambient]

I posted earlier on in this forum that we were about to start a 9 pot lettuce raft system. Since that time we have made some progress and hope to have a harvest soon. I need some help though. It seems books can only take you so far One of the seeds just seemed to take off way out in front of the others. Now it is encompassing most of the entire system, covering up leaves from some of the other plants. Another issue I ran into was with some seeds not germinating. I decided at that point to first germinate (not in book) then transplant to system. Wound up replacing a few of the pots that had no growth with well germinated seedlings. Also a few of the late bloomers have begun to come around.

I do not remember the exact genus. I want to say Letuca Sativa or Garden Salad. The bag says 40-50 days for harvest. I'm not exactly sure what harvest time should look like either. Imagine it's something similar to what is shown on the bag.

This is day 25 , 8 days ago. I should probably post a more recent picture but you can get an idea from these:

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IMGP0459.JPG (image)

Any ideas or suggestions for this one monster in the midst ? I have thought about perhaps roping it up , but not sure if that was a good idea.

It is fun so far and pretty happy with this first time experiment. Keeping the Ph adjusted, temps and nutes have been easy.