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Did you ever get any answers, Cowell? I am asking the same questions but can't seem to find any real answers. Did you end up getting the movers? What was the result?

In side by side tests, I got 25% more weight from a Sunmaster 1000 watt bulb as compared to a GE 1000 watt bulb. Sunmaster says its the better color spectrum that makes the difference.

I got a question for you, Streetlegal: Since Buds don't begin to show until about 2 weeks under 12/12 lighting, and I am trying to save on electricity costs, Can I use florescent lights for the first 2 weeks of 12/12, before moving them under the HPS with out reducing my final harvest weight?

Since Buds don't begin to show until about 2 weeks under 12/12 lighting, and I am trying to save on electricity costs, Can I use florescent lights for the first 2 weeks of 12/12, before moving them under the HPS with out reducing my final harvest weight?

I got some Master Hindu Kush from Harborside 6 weeks ago. The plants have grown very tall very fast. I transplanted one to a bigger pot yesterday and found it had a very small, weak root system, which concerns me. They also have very brittle leaf stems that snap off easily. Does anyone have any...

My Master Hindu Kush also got very tall very fast. I have low indoor headroom so its becoming a problem. But they say it produces heavy yields. Maybe it gives heavy yields because it grows so tall. I've got 3 more weeks of veg, so I hope it doesn't go thru the roof.

My problem appears to be solved. I had very yellow new growth during the first week of flowering. My problem, which looks similar to yours, may have been caused by a different set of circumstances. I tried epsom salts and 2 pots, miracle gro on 3 pots, and Sensi bloom A and B on 2 other pots...

Thanks Jawbrodt. I'll try adding sulphur (epsom salts in water) tonight when the lights come on. My nutes (Sensi grow and sensi bloom) don't seem to have any sulphur. They do have iron, so I doubt if that is my problem. My soil, Foxfarm Ocean Forest, may or may not have any sulphur.

Nizmo, This is exactly the problem I am having right now. Almost immediately after switching to 12/12 light, all new growth is yellow. After one week of 12/12, they are still yellow. I didn't know until reading this thread that I should be using veg nutes for the next 2 weeks, so I will switch...