Use spring water if you can. Make sure the water is not too cold, let it warm up to room temp. Just give some plenty calcium and Nitrogen rich feed about twice a week (1ml to 1 litre water), you don't mention a fan? will keep bugs and mould away from your fan leaves. they look good right now, I...
I have my 400hps light about 12 inches from the top of the plants, they don't seem to bother, in fact they love it. As long as the fan is blowing near the light, plants will not over heat.
don't worry about it, those buds look healthy, stretching worries are overrated, stretching doesn't matter during flowering, veggie, maybe, I'm just assuming here, so don't kill me ;)
this is m first autoflower (Northern Lights). This girl is 50 days from seed. Using Westland soil with added John Innes, it's the best medium I've ever used, the pH remains perfect as autoflower plants don't need a lot of attention. Using minimal feeds. I have a good airflow and filter set up...
wow, I'm taking note of this. I always thought this, if autoflowers don't care about 12/12 light cycle, then they would grow with ANY light cycle, as long as they get more than 12 light. ?
oh I see your light , sorry, wow, 4000watts sounds high, but i don't know the difference between HPs that I'm using, 400watts, and those new types of LED lights