Today is week 5 now since dropped in water to be honest I think these are growing slow compared to other peoples. I changed a couple of things like upped wattage of metal halide from 250 to 400 and started giving full strength nute from half strength which I should of give 3 quarter strength instead of full because I can see a slight tip burn so will back of a little. Water every day till run off. At some point this week I will top for the first time to get the main line thing up and going.
See you next week peace.
They not small at all pal. You can't judge a seedling by size for at least the 1st 14 days have passed then you'll know for sure if they are slow. To me, they look good.
Your RH is little low. I find that if I wet a bath towel and hang it from the top bar at the side of the tent. As it dries it'll bring her RH up 2 70+%.. but as I said. They look on track.
Enjoy the rest of your grow.