Super thrive or other chelated micro nutrients. Solve your stress issue.

And this little, you don't need powerful lights or massive amounts of food.

And especially beautiful job with choosing stable genetics.

And these plants are designed to get eaten by rabbits and deer. So your tiny little pinch was just fine. I usually wait until they get a little bigger and select that shoot for the first clone.

If you're starting by seed that's another thing you should also be thinking about.

Hopefully it's not a feminized seed... The edition of the extra stress for the extra genetic complication.

Personally I just threw a bunch of seeds down and the nicest one was usually selected out for my mother clone plant producer. And there's no genetic degradation over repetitive generations of cloning.

Personally my absolutely love your baby pictures! Awesome little plant you got going there and perfect timing that you are taking care of this. If you're going to put her outdoors back vegging like you were doing is going to give this plant an extra running Head start.