Plant Problem.

also 1 plant has been left as a mother and is on the window ledge its doing realy well on the same feed patten, same water.. and with day light, there are no curled leaves on the mother. would this suggest that the plants DO need more N because the 2 other plants r flowering?

your humidity is way to high in there 73-83. get some heat in there, it will lower your humidity, until your hps gets in.

your plants are fine, dont worry.

during flower you need to raise your K and P ALOT. they could be hungry

are there any K an Pa additives you an buy?