Trees

Maybe it's your camera, but the leaves look very light-coloured. This is a signal for the more experienced grower to adjust nutes.

But I'm still on your side to let this first grow ride and learn from it. Next time you can invest in some good food for cannabis and see the difference, combined with a proper training it will blow your mind.

For your first grow with unknown seeds, chapeau.

What are you giving it for food/nutrients?

If it’s just a premix soil of like miraclegro with time delay nutrients it doesn’t have the right nutrients to take it through flower, they hungry.

That looks like mild nitrogen deficiency. Growing hydroponic herb requires a lot of nutrients. It's not like regular houseplants because they get so much more light. To do a good job, you really need probably a three part fertiliser system. At the very least, a high nitrogen fertiliser for growth, and a high phosphorus/low nitrogen fertiliser for the flowering cycle (lights 12 hrs on/12 hours off).

HOWEVER, it looks like you are fairly close to finishing these. How many more weeks do you plan on going before you harvest them? It's common in the last week or two to just give the plants pure water (no fert) to force it to use up excess nutrients in the plant itself. Anecdotally, too much fertiliser salts in the plant itself contributes to a harsh smoke. You may just choose not to worry about Mike noticed deficiency and enjoy the end product.

All in all, your plants look pretty healthy. I'd recommend doing some research on pruning for next time. You've got some pretty substantial lateral growth. Stems are a waste of effort... unless you're shooting to make bespoke hemp.