Well back with some results, for whatever it's worth: After some research and advice from the viewers, I added 1 1/2ml. of white distilled vinegar to 1/2 gallon of tap water with a 6.7Ph reading, mixed thoroughly and let sit over night. Added about 4 oz. to each plant the next day after not watering for about 2 days. Next watering was in 3 days with the same amount and mixture ; Note: 3 week old plants in 3 gallon pots in soil. Checked the girls yesterday after last watering about a day ago. and .... HOLY MACARONIS... Makin ME HAPPY .. It's workin for me. So I'm going onto the 4th week of Veg. and about 4" tall with about 3 sets of nodes maybe 4, don't really know if this is optimum for NorthernLights ?? but hey they seem to be happy and I'm happy so far so so far 'IT'S ALL GOOD". Don't ask for pics. I'm not a techy kind of dude.. To much pressure on myself to try and down/up load the stuff ,sorry I'm better at describing. I think the every 3 days of watering is also the trick... But hey it's all a fun filled journey...And 1st grow training session.