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Hello. I live in Colorado and am in need of tons of organic material to mix into my soil to help build it up. I don't know how cultivation works, and if they reuse their supplies or compost themselves. Do you think grow operations would have used soil and/or discarded stems to be given away?

All great info. Thanks to everyone who's contributed to this thread. I believe I do have a much better understand to my original questions. All-in-all I feel balanced lights holds keys we yet too understand. And for smaller grows having a higher balanced irradiance is more important than...

"ConclusionsIn this study, blue light has been shown to trigger both a qualitative signalling effect enabling normal photosynthetic functioning of cucumber leaves and a quantitative response stimulating leaf development normally associated with acclimation to irradiance intensity. Leaf...

Does anyone have the link for lighting for different stages of growth? Thanks, SupraSPL, for sharing the XLM2's that you use. Although only 350ma? Those are rated up to 3000 (as I'm sure you know). You may not want to go full 3000 but why not at least 1500, get a lot of light from them...

This is all great info, thanks! Even though some may be repeating each other it is really helpful to hear it from different perspectives as it gives me a clearer picture. I do wonder if KNNA's info might be a little outdated at this point with advancements in LED. If only PetFlora would...

I buy Cree XP-G and here's the Relative Spectral Power Distribution of cool, neutral, and warm. http://img849.imageshack.us/img849/5571/xpg.png They do in fact contain a decent amount of blue, but specifically my question is why more emphasis is on red than blue (not no blue, just why not as...

It was my understanding that red encourages vertical growth, and that more blue makes for shorter plants, not the opposite. Was I wrong? I completely understand the shift to red for flowering as summer's red/orange glow sets in. But for vegetative growth this is why I'd think Blue should be...

thanks for the feedback everyone. And PetFlora, I'm so glad you joined the conversation because I've seen many comments on this topic from you that I wanted answers to! I should have mentioned the LED I use are all bought a la carte from "Rapid LED". I enjoy building my grow lights myself...

Ready to get flamed, but I've lurked for a long time now, and for LED lighting it seems the complete consensus is the ratio should heavily favor Red to Blue even for Veg growth. I've searched long and far and having not done the experimentation myself, for veg growth I would like to know up...