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I have heard that MH bulbs produce a more "sun-like" spectrum with more plant-active blues and reds than HPS does. However, MH bulbs, especially conversion bulbs for HPS ballasts, produce about half the lumens HPS does. They do put out less heat than HPS, so you can put them closer to plants and...

I have a few clones that look yellow and some of the leaf edges are 'crispy' brown and dying. It's only happening to a couple of the smaller ones, the bigger ones look fine. I'm using potting soil and a 600w MH about 18" away from the top of the plants on an 18/6 cycle. Could they be light...

I got a free sample, a small bag of these recycled glass aeration stone things and was thinking of putting some in the bottom of my 3 gallon GeoPots when I transplant. Is this necessary? Will it hurt the plants? The girls are small, so I don't think they will need all the water the 3 gallon pots...

There is a local Humboldt County produced brand of organic nutrients called Primordial Solutions. Here is a link to their brochure. They promote the stuff pretty tough at the Beneficial Living Center, a store owned by Beneficial Biologics but I've heard good things from independent sources as...