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I came home from work today to notice that my bulb went out in my grow box. it has been off for 20 hours. I am in the third week of flowering and I noticed that my newer leaves are turning yellow from the inside out. Can any tell me if I have anything to worry about and is the yellowing due to...

I have has had no problems with this plant till now. I watered on sunday and i am getting ready to water again but i noticed that my newew leaves are turning yellow but the veins seem to still be green. i think it might be iron but i just want to see what you guys might think. here is some...

just some pics I snapped. Three weeks old using a 600 watt hps with some nutes that came free with the light. Any way to tell what strain??? i got them from marijuana-seeds.nl. Any thoughts or comments would be appretiated:leaf::bigjoint::leaf:

I am having trouble finding cal-mag 2-0-0. could anyone tell me if there is something else that is close to this product. :peace:

When I ordered my grow light from humboldt nutrients they sent me a free 40oz. sample of a "master a", a 4 oz sample of "master b" and some big up powder. On the bottles it says to add master a to reservoir first to avoid nutrient lock-up. I am growing in soil so the instructions they gave me...

This is a 4 week old purple haze bag seed. About a week ago I noticed the leaves starting to droop and some brown spots on the bigger fan leaves. I thought i might have over watered it so I let it dry out for a week and watered it yesterday. I am also using humboldt nutrients master a- master b...

Can anyone tell me if i can wire a pc fan to a house outlet or do I have to run them off a 12 volt battery the whole time.:blsmoke: