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I have a few plants that are showing signs of a deficiency. The leaves are yellowing and black spots underneath. Noticing on the lowering fan leaves and a few of the top leaves. This problem is only affecting 3 of the 22 plants. Strain: Purple Kush (clones) Plant Age: 28 days of veg/...

I currently grow in a 90sf room. I have (2) 4'x4' grow trays and (2) 1000w lights, using 6" rockwool cubes. Now I will be building a 150sf room. Going to use (4) 1000w lights and (2) 4' x 8' trays. Planning on staying with the rockwool since they are very forgiving and inexpensive. My biggest...

I will be adding a 4'x8' grow table to a grow room. I was wondering if I used a 6ft light moving track and a 1000w light w/ a dimpled umbrella hood. Would this be enough light for the plants.Going to have 18 plants on the table. Or would it be better to use (2) 1000W lights? Can someone please...