I've no idea why this plant doesn't look like her sibling.

[growsomebuds]

The same strain, born a week apart. Treated the same, yet, the little plant just doesn't want to drink much or very often.

[Qwertywill]

Question, What strain is it? Was it crossed with a smaller growing plant? It could be the genes. It could be something else, not sure, More will comment!

[NAKEDGARDENER]

Is the general hydroponics nutrient trio good for soil? I don’t know cuz I’ve never used them. Also with Indicas they can be slow take a look at the one on the left in this pic which is an Indica strain, the others are Sativa, the Indica drinks a lot less, I know you’re other plant is also an Indica possibly your roots on that one are less developed so not able to take up as much... hydroguard from general hydroponics is great for their root system and safe with live soil... others use different root inoculates, I like the gh hydroguard.

[growsomebuds]

The root system is screwed up a bit. That Hydrogaurd will be used in all future grows. I started 2 more of the same strain, only to have root issues, learned from an autopsy. I did everything right, except for having my lights too close for a few weeks. The roots just weren't growing anymore, a month after a good transplant.

[alltatup]

Most siblings don't look alike. That's why breeders look for the strongest plants with the most desirable traits to breed, but we're still going to see differences between 2 seeds.