Little yellow in the middle of my little plant is this normal?

In this it has a little yellow in the middle and was just wondering if that is normal and notice one of the leaves starting to hang a little on it. I’m a first time grower can you please help?

Try taking a pic under white light, blurples play games with your eyes. From what i can see, its just a tad pale in the center which is normal when cannabis dives into vigorous growth.

SPLFreak808 said:

Try taking a pic under white light, blurples play games with your eyes. From what i can see, its just a tad pale in the center which is normal when cannabis dives into vigorous growth.

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Here are some pics of all 4 of my plants today. One of them is a week and two days behind. In your opinion do they all look healthy? Also is it safe to have the younger one in there with them?

Sorry dude, i hate repeating myself.