Are My Plants Healthy?

First time grower here. my plants are about 3 weeks old. I noticed the brown and yellow on the first leaves on one of my plants, also on another plant you can see some intense curling that im guessing is due to overwatering? the pot that the curled plant is in doesnt drain well so maybe thats the case. but over all how do they look and does anyone have some advice for me?

first grow 7 lsd 2 critical 11litre pots ph6.1 ec1.4 every 2 or 3days they get fed half litre of water with nutes using canna coco they ar 6 weeks from seed 2weeks in 12/12 moad their taken a good strecth but no sign of flowering when shud i c the white hairs poping out im useing a tent think its 1m square 600watt hps 125 air intake 150 air out take desk fan just blowing them in rotation looking good over all but 2weeks into flowering and no white hairs all feminiesd seeds any advice plz much appreicted thanks pictures 2morrow