This Romaine Lettuce Is Growing Funny

I started this romaine lettuce from a food scrap.  It started out growing lots of green that you see at the bottom.  that green did not grow much further, but new sprouts grew in up and tall. Shown here like the big plant in the front. I planted it in a container after it looked like it was growing good.  It has been about a month.  I would expect this to look more like a head of romaine rather than a weed.  I watched many youtube videos about growing romaine from scratch and theirs do not look like this-they look like a small head of romaine.  The newer scrap that is in the back is doing the same thing.  Tried to prune, but did not work too good-still growing up like the first. What am I doing wrong or is it really supposed to grow this way?

I took pictures so you can see:

Just a thought, but it looks to me like your lettuce is bolting.  It might be too warm.
https://www.gardeningknowhow.com/edible/vegetables/lettuce/bolting-lettuce-plants.htm

Karl Treen wrote:Just a thought, but it looks to me like your lettuce is bolting.  It might be too warm.
https://www.gardeningknowhow.com/edible/vegetables/lettuce/bolting-lettuce-plants.htm

That was a very interesting link, thanks Karl.

Also, if you started it from the stump of a kitchen head of lettuce, that plant may have been ready to bolt anyway, since lettuce is not a perennial.

You can still eat those leaves and when it flowers just let the seeds fall and you will have more plants.

If you have the plant indoors [looks like you have grow light on it] then that also may have contributed to it bolting as it might be too warm.