Help me figure this out....

Hello all, my first try at indoor with autos. 3 plants, all in 100% FFOF. One plant was started 10 days later but started flowering the same time as the older ones. So basically all 3 are in roughly week 2-3 of flowering. Other than some minor yellow/burnt tips, probably from the hot soil, I’ve seen no real issues. The pics show the younger plant in the middle. I just began to give a small, about 1/3rd, dose of bloom nutes. Before that it was only water and a touch of fish sh!t.
My question is why the younger plant is dark green and the other 2 are a lighter shade. I don’t know whether the one is too dark or the others are too light. Other than the soil being a little more/less depleted of amendments, all 3 plants have been treated the same. Strain is super skunk auto, under HLG 320XL LED.
For the record, I don’t see any yellowing on any of the plants, even the lower parts.
Some insight here would really be appreciated.
Thanks everyone.View attachment 5039777View attachment 5039778View attachment 5039777View attachment 5039778

Although you treat 3 plants the same, even 3 plants from the same seedpack, they'll have individual nutritional needs & in the case of autos, will all flower on their own accord.

My guess is the dark one, like you said, didn't deplete the soil as quickly. Consider rotating your plants around too? Maybe the environmental conditions on the outer edges, vs the middle, is prompting them to "respond" differently?

Ma guy @twentyeight.threefive told you, it's just pheno expressions. Genetics express different in plants, even if in same environment

I just saw that.

No need to make multiple posts asking the same thing.

Sorry for the multiple posts....I didn’t think it posted the first time because it asked again...my bad.
Does it look like either shade of plant needs anything ?

Nope, I don't see any clawed leaves or badly burnt leaves. Honestly all looks good, ride it out!!