Looks like they could use some water bro, at 3 weeks old i water my plants with the Flood and Dry method (tks Garden Knowm).. what i do is, i give the plants a massive amount of water, about 1/2 to 1 time the capacity of the pot, (u need excellent drainage for this or u may rot the roots) then i let the soil dry (about 3" from the top) untill i water again....this watering system allows roots to develope through all around the entire pot and not just down (wich causes root bound very quickly)...the other advantage is that u dont need to go and water every day...plants seem to love it...