Hi everyone, first time poster and grower here. I have two different seeds planted (rocklock/lemonskunk) and they are both having the same problems.

These guys sprouted about 6 weeks ago and seemed to be growing well (albeit somewhat slowly) under CFLs for the first two weeks. Then I added a 150w HPS. I had about 6 leaf sets on each plant, but eventually the tips started drying up and dying, at the same time the plant just stopped growing. It did this for about 2 and half weeks. About a week ago after 4 sets of leaves dropped off the plants started to slowly grow again.

I never added nutes since they just seemed to small to have a nutrient deficiency, but i'm guessing that may be the problem after all. Just wanted some opinions.

indoor or outdoor indoor
soil, soilless, coco, aero, or hydroponic soil
Soil type/brand Fafard potting soil
Anything you have added to the soil lime and peat moss
Soil or slab runoff pH 7
Water source tap
Source water pH 7
Age of plant 6 weeks
Type of fertilizer none
Lighting source and distance from plant 150w HPS & 2 CFL, 18"
Air temperature 70-80 during the day, night i don't know, lower i'm sure
Air % Relative humidity ~20%
Lighting schedule 18/6
Type of ventilation your room has good ventilation

thanks in advanced for the help!

See photos:
knubie Reviewed by knubie on . 6 weeks in, only 4 inches tall Hi everyone, first time poster and grower here. I have two different seeds planted (rocklock/lemonskunk) and they are both having the same problems. These guys sprouted about 6 weeks ago and seemed to be growing well (albeit somewhat slowly) under CFLs for the first two weeks. Then I added a 150w HPS. I had about 6 leaf sets on each plant, but eventually the tips started drying up and dying, at the same time the plant just stopped growing. It did this for about 2 and half weeks. About a week Rating: 5