Is this ph or what?

[Growa]

First post. I have 3 plants and I’ve done different things to each. The only common thing between them all is the soil used. Kandy kush is in a smaller pot 3-4 gallon the 2 critical purple are in 5 gallon pots. One CP I did some pretty heavy LST, trimming and have about 25+ bud sites
the other germinated a week later and I did some LST but nearly no trimming and it’s now taller than the other CP the kandy kush got a central pinched off a few weeks in and that’s it. It’s growing the fastest has about 10-12 solid colas coming. It’s middle back Cp 1 front right second Cp front left.

kk seems to be lime green. Can’t seem to correct. I can’t imagine it’s soil ph because it’s all same soil. All same water
and all same nutrients so it’s not nitrogen burn I don’t think… I have given more nutrients. It is lit mostly by a lower wattage light and the front 2 sit under a higher wattage light but I figured it’s all blended
pics attached
would love some ideas how to ensure KK is healthy or how to ensure it sty’s healthy enough. I think it’s only a couple weeks. Away from being ready to flush

[SoOrbudgal]

Hello and welcome Growa could it be just a strain thing? Perhaps it's not a dark green leaf strain? Don't over feed it just give it normal feedings, we've all thought at one time giving more N may help but sometimes it's more PK it's looking for. Have you ever tried Epsom Salt normal stuff, cheap Mag suppliment 1tablespoon per gallon. Does your food have Cal Mag in it? Allow it to dry prior to wetting it again. Nice looking grow you have, how far are your lights away?

[Bluey]

My understanding is light green low in N, dark green high in N or possible N toxicity... and as above re PK. They look pretty good in the pics though except the lime green one appears to have yellow tips on the leaves which is not nute burn but a deficiency from memory...I can't check right now though.